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64 results about "Wet digestion" patented technology
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Wet Digestion. The wet anaerobic digestion process is applied to liquid waste streams that are conveyable by liquid pumping. Sometimes wet systems are called Low Solids AD (LSAD).
Sample digestion processing device
ActiveCN102095628AReduce harmEliminate human errorPreparing sample for investigationHeat conductingEngineering
The invention provides a sample digestion processing device, which comprises a frame, a heater and a solvent supply mechanism, wherein the heater is provided with more than one test tube accommodating hole; test tubes can be arranged in the test tube accommodating holes; the solvent supply mechanism is provided with a feeding nozzle which is arranged above the heater, can move transversely and / orlongitudinally in the horizontal plane, and is connected with a solvent storage chamber; and the heater and the solvent supply mechanism are respectively arranged on the frame; a test tube bracket isarranged on the heater; through holes corresponding to the test tube accommodating holes of the heater is formed on the test tube bracket; the heater comprises a heat-insulating tank body, and a heatconducting body arranged in the heat-insulating tank body; the test tube accommodating holes are formed on the heat conducting body; and the test tubes are arranged in the test tube bracket and the test tube accommodating holes. In the sample digestion processing device, the solvent is fed by the solvent supply mechanism, the sample is digested not by a manual wet digestion method, and the devicecan realize the quick digestion processing of quantitative solvents and samples added into the test tubes.
Owner:BEIJING POLYTECH INSTR
Method for analyzing arsenic content in glass refining agent
InactiveCN101620186AAvoid volatile lossSimplify the analysis processAnalysis by thermal excitationOperabilityDigestion
The invention discloses a method for analyzing arsenic content in a glass refining agent, which comprises the following steps: processing samples by a potassium permanganate preoxidation-hydrofluoric acid wet digestion method to obtain a sample digestion solution; measuring the content of arsenic in the digestion solution by an inductance coupling plasma atomic emission spectrometry. By using potassium permanganate as a pre-oxidizing agent to carry out routine wet acid digestion on glass refining agent samples, the method can effectively avoid volatilizable loss of low-valent arsenic components in the preliminary processing of the samples, therefore, a routine inductance coupling plasma atomic emission spectrometer can be used to directly measure the content of the effective content-arsenic in the glass refining agent without allocating a hydride generator or an atomic fluorescence spectrometer. The method has the advantages of high operability, high analysis speed, high accuracy and favorable sensitivity and repetitiveness.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Method for efficiently measuring content of Cu, Fe, Mn and Ca in cereal food
InactiveCN104865211AQuality assuranceImprove applicabilityPreparing sample for investigationColor/spectral properties measurementsPhysical chemistryCalcium content
The invention discloses a method for efficiently measuring the content of Cu, Fe, Mn and Ca in cereal food. The method comprises the following steps: digesting a sample, drawing a standard curve, measuring the sample, weighing 2.000 g of the sample, adding 20 mL of a nitric acid and perchloric acid mixing solution to perform wet digestion, wherein the volume ratio of nitric acid and perchloric acid is 4:1; under the best working condition selected for an instrument, measuring the absorbance of a standard series of solutions, taking the concentrations of elements as an x-coordinate, wherein the absorbance is a y-coordinate, and drawing a standard curve; keeping a favorable linear relation between the mass concentrations of Cu, Fe, Mn and Ca and the absorbance, wherein the mass concentration ranges of Cu, Fe, Mn and Ca are respectively 0.2-2.0 mg / L, 0.5-6.0 mg / L, 0.5-4.0 mg / L, and 2.0-10.0 mg / L, the correlation coefficients r of Cu, Fe, Mn and Ca are 0.9990, 0.9980, 0.9985 and 0.9999. The method has the advantages of being capable of continuously measuring the content of Cu, Fe, Mn and Ca, accurate, fast, stable, simple and convenient.
Owner:GUIZHOU INSPECTION & QUARANTINE TECH CENT
Screening method of total lead content in textile
InactiveCN106872454AEasy to detectShort detection timeMaterial analysis by observing effect on chemical indicatorPreparing sample for investigationMalachite greenMalachite green stain
The invention provides a screening method of a total lead content in a textile. The method comprises the steps of (1) cutting 0.5g of textile coating into pieces; (2) adding 5mL of concentrated nitric acid and 1mL of hydrogen peroxide, carrying out wet digestion for 40 to 60min under an environment with the temperature being 150 to 170 DEG C, and cooling to the room temperature; (3) filtering, and adding 3mL of strong sodium hydroxide solution into a filter liquor; (4) using dilute nitric acid and a dilute sodium hydroxide solution to adjust a pH value of the filter liquor to 3.0 to 4.5, respectively adding 0.5mL of ascorbic acid solution, 1mL of potassium iodide solution and 0.4mL of malachite green solution into the filter liquor, filling to volume being 10mL, and after uniformly mixing, determining the total lead content in the textile according to a lead solution developing entity. The method is simple to operate, low in cost, and capable of quickly determining the total lead content in the textile through a malachite green complexation developing method and a visual colorimetric method, and has a favorable application prospect.
Owner:SHANGHAI INST OF QUALITY INSPECTION & TECHN RES +1
Nitrogen blowing instrument and wet digestion method using same
ActiveCN104655477AExplosion-proneSolve the dangerPreparing sample for investigationShielding gasNitrogen
The invention discloses a nitrogen blowing instrument. The nitrogen blowing instrument comprises a bracket, a shell on which a pipeline is placed, a blowing needle and a heating device, wherein the shell with the pipeline is fixed on the upper part of the bracket, the heating device is fixed at the lower part of the bracket, the lower surface of the shell with the pipeline is provided with the detachable blowing needle, the blowing needle is connected with the pipeline, and the pipeline and the blowing needle are made from polytetrafluoroethylene and copolymer thereof. The invention further discloses a wet digestion method using the nitrogen blowing instrument. The method comprises the following steps: 1) placing a sample and a reaction reagent in a digestion cup; 2) placing the digestion cup on the heating device of the nitrogen blowing instrument; 3) placing the blowing needle of the nitrogen blowing instrument in the digestion cup and introducing a protection gas; and 4) setting or changing the heating temperature of the heating device according to a preset digestion temperature according to the types of the sample and the reaction reagent. The nitrogen blowing instrument disclosed by the invention is simple in structure, and is capable of effectively preventing explosion when applied to wet digestion, the security of the operation is improved, the secondary pollution of metal can be effectively avoided, and the accuracy of the detection result is guaranteed.
Owner:成都产品质量检验研究院有限责任公司 +1
Method for measuring sulfur content of steppe plant
InactiveCN103969261AAnalysis fitSimple and fast operationMaterial analysis by observing effect on chemical indicatorPreparing sample for investigationSulfateTurbidity
The invention relates to a method for measuring the sulfur content of steppe plant. The method comprises the specific processes of a, collecting a steppe plant sample; b, treating the sample: b1, cleaning, b2, drying, b3, grinding and b4, smashing; c, measuring the sulfur content of the plant: performing measurement by an acidic wet digestion-barium sulfate turbidimetry, putting the plant sample under the action of a catalyst and an oxidant to oxidize organic sulfur until all sulfurs in the plant are converted into sulfates, then adding a quantitative amount of acid and a turbidity agent to generate barium sulfate suspension, and performing turbidimetry measurement at the wavelength of 440nm; and d, analyzing according to a sulfur content measurement result of the plant. According to the method for measuring the sulfur content of the steppe plant, the sulfur content of the whole plants in dominant species / subdominant species can be measured.
Owner:INNER MONGOLIA UNIV OF TECH
Method for determining lead, cadmium, chromium and mercury in plastic through EDTA-2Na complexation digestion
InactiveCN105044078AStability determinationAccurate measurementPreparing sample for investigationAnalysis by thermal excitationDigestionLinear regression
Owner:DONGGUAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU +1
Method for rapid determination of selenium content in tetrastigmatis hemsleyani
InactiveCN104122241AAvoid pollutionAvoid timeFluorescence/phosphorescenceAtomic fluorescence spectrometryDigestion
The invention discloses a method for rapid determination of the selenium content in tetrastigmatis hemsleyani, wherein a microwave digestion-hydride generation-atomic fluorescence spectrometry method is adopted for determination of the selenium content. With microwave digestion, the digestion efficiency is high and fast, moreover, acid removing is not required after digestion, operation steps are simplified, pollution is reduced, the accuracy rate is increased, disadvantages of easy pollution of wet digestion and long digestion time are avoided, acid removing is not required, concentrated hydrochloric acid is directly added for reduction of selenium, and the digestion procedures are simplified; the detection cycle is greatly shortened, and the original detection cycle of 8-10 hours is shortened to 2-3 hours; and the detection is rapid and accurate, and the operation is simple.
Owner:GUANGXI BOTANICAL GARDEN OF MEDICINAL PLANTS
Method for determining lead content of feed mildew preventive
InactiveCN105628633AImprove stabilityGood precisionColor/spectral properties measurementsPotassium ferricyanideDigestion
The invention discloses a method for determining the lead content of a feed mildew preventive. According to the method, wet digestion is conducted on the feed mildew preventive by using nitric acid, hydrochloric acid and hydrofluoric acid to obtain a digestion solution, hydroboron, potassium ferricyanide, sodium hydroxide and a lead stabilizer are prepared into a lead determination reagent, the digestion solution and the lead determination reagent are carried into a chemical atomizer for hydride generation, hydride is led to an atomic absorption spectrophotometer by using carrier gas to perform flame atomization, then the absorbance value of a lead element at the position of 283.3 nm wavelength is determined, and the lead content of the feed mildew preventive is obtained through calculation based on an established standard curve. The method enables the detection limit of the lead to reach the level ppb and can achieve trace detection, and the relative error of a parallel determination result is lower than 10%, the accuracy of the detection result is good, and the detection data is more real and reliable.
Owner:CHONGQING MINTAI NEW AGROTECH DEV GRP CO LTD
Method for detecting content of trace elements in blood vessels
The invention discloses an analytical method for detecting the content of trace elements (phosphorus, calcium, magnesium, iron and zinc) in blood vessels by an inductively coupled plasma emission spectrometer. The method comprises the following steps: performing wet digestion by using a nitric acid-hydrogen peroxide digestion system, establishing a standard curve, and simultaneously detecting thecontent of five trace elements comprising phosphorus, calcium, magnesium, iron and zinc by the inductively coupled plasma emission spectrometer. The method provides an important data analysis and detection basis for exploring the influences of the content of the trace elements on the elasticity of blood vessels and the damage, restoration and apoptosis of vascular endothelial cells in order to further find the interaction law between the trace elements and vascular diseases.
Owner:KUNMING UNIV OF SCI & TECH
Method for measuring rhodium content in rhodium-containing compound
InactiveCN103528913AHigh precisionEasy to operateWeighing by removing componentObservational errorNitrogen
The invention relates to a method for measuring the rhodium content in rhodium-containing compound. The method comprises the steps of: 1) roasting by using high-temperature air to decompose rhodium-containing compound to be rough rhodium oxide; 2) grinding the rough rhodium oxide, immersing with 1-6mol / L hydrochloric acid for 1-5h at 50-70 DEG C and filtering to obtain filter residue; 3) reducing the filter residue with high-temperature nitrogen to change the rhodium oxide into rhodium powder; 4) weighing the rhodium powder and calculating rhodium content in the rhodium-containing compound. By adopting the method, rhodium content in the rhodium-containing compound with regular rhodium content which can be decomposed to be oxide by heating can be accurately measured, addition of other reagents for separation of rhodium is not needed, measuring error caused by repeated dilution with a power-spectral method is avoided, and rigorous requirements of high-temperature and strong-oxidizing-property wet digestion on the equipment are avoided. The method is convenient to operate without introducing solid impurities and has the advantages of high accuracy and recovery rate.
Owner:CHINA NAT OFFSHORE OIL CORP +2
Wide Screen Lime Block Wet Digester
The invention discloses a wet digestion apparatus for wide size range lime blocks. The apparatus comprises an inlet pipe, a feed liquor distributor, a net chain machine, a slaker, a filter screen, a flush water pump and a flooding nozzle; a net chain on the net chain machine moves at a certain speed, the inlet pipe above the net chain machine delivers lime blocks onto the net chain machine, digestion water above the net chain machine flows out through the feed liquor distributor and splashes down to uniformly wet the lime blocks, lime blocks begin to be digested and disintegrated, the flush water pump pumps out digestive slurries in the slaker, digested substances of the lime blocks are swashed by the flooding nozzle arranged at the end of the net chain machine to form a slurry which flows into the slaker, the slaker is provided with stirring vanes which continue digestion of lime, and the lime slurry overflows to downstream equipment through the filter screen and an overflow pipe. The apparatus provided in the invention can digest lime blocks, basically has no requirements for the particle size of lime blocks, enables total energy consumption to be low and has the advantages of good adaptability, high reliability and a long service life.
Owner:JIANGSU LANSHAN ENVIRONMENT TECH
Method for determining content of arsenic pentoxide and arsenic trioxide
InactiveCN102830112AHigh selectivityPreparing sample for investigationAnalysis by thermal excitationSolubilityArsenic pentoxide
The invention relates to a method for determining content of arsenic pentoxide and arsenic trioxide. The method comprises crushing to-be-detected samples, extracting and separating the arsenic pentoxide in the samples in accordance with dissolvable differences of the arsenic pentoxide and the arsenic trioxide in ethanol, digesting the extract with acid, determining arsenic of the arsenic pentoxide with an inductively coupled plasma atomic emission spectrometer, determining total arsenic content with a wet digestion method, getting arsenic content of the arsenic trioxide by calculating difference between the total arsenic content and the arsenic content of the arsenic pentoxide, and obtaining contents of the arsenic pentoxide and the arsenic trioxide in the samples according to molecular weight conversion. The method is rapid and effective, and relatively high in selectivity. The invention provides a reliable and conveniently implemented method for respective determination of the content of the arsenic pentoxide and the arsenic trioxide.
Owner:GUANGZHOU PONY TESTING TECH
Method of determining selenium shape of honey and fruit juice by solid phase extraction-atomic fluorescence spectrometry
ActiveCN106770116AEfficient separationEfficient determinationPreparing sample for investigationFluorescence/phosphorescenceFruit juiceAtomic fluorescence spectrometry
The invention discloses a method of determining selenium shape of honey and fruit juice by solid phase extraction-atomic fluorescence spectrometry. The method comprises the following steps: separating organic selenium and inorganic selenium in honey or fruit juice under a condition of pH being 3 by means of an SCX solid phase extraction column; then adding a mixed acid to digest and separate to obtain an inorganic selenium extraction liquid; then determining the selenium element by means of atomic fluorescence spectrometry; determining the content of total selenium by means of wet digestion; and finally obtaining the content of the organic selenium by means of a minusing method. The method of determining the shape of selenium separates and determines inorganic selenium and organic selenium accurately and effectively by combining technologies of ionic adsorption exchange, acid digestion and atomic fluorescence spectrometry and the like. The method is simple, environmentally friendly and efficient, thereby providing a powerful technical support for evaluating the functionality and safety of selenium-enriched honey and juice.
Owner:安徽出入境检验检疫局检验检疫技术中心
Method for automatically and quickly digesting food sample
ActiveCN110987592AReduce usageAvoid lostPreparing sample for investigationMaterial analysis by electric/magnetic meansProcess engineeringDigestion
The invention discloses a method for automatically and quickly digesting a food sample, and belongs to the technical field of physical and chemical inspection of food hygiene. According to the invention, a full-automatic graphite digestion instrument is adopted for digesting the food sample, a matched cover needs to cover a digestion tube in the digestion process, and 1 / 4-1 / 2 of the bottom of a digestion tube body is located in a graphite hole to be heated. The method overcomes defects of the existing food sample digestion methods, such as long time, easiness in pollution, inapplicability to determination of volatile elements such as arsenic, mercury, tin, selenium and the like of dry digestion, high consumption of acid, multiple types of acid, long digestion time, high blank value, high possibility of polluting the environment, inapplicability to determination of mercury and the like of wet digestion, and the risk of high-pressure tube explosion, small digestion sample amount, high labor intensity of tank screwing and cleaning and the like of microwave digestion.
Owner:宁波市产品食品质量检验研究院(宁波市纤维检验所)
Full-automatic inorganic sample pretreatment acid-removing constant volume reaching instrument
The invention discloses a full-automatic inorganic sample pretreatment acid-removing constant volume reaching instrument which comprises an interface module used in combination with a single-mode microwave digestion instrument; a heating module used for heating according to set temperature after cleaning is completed; a cleaning module for cleaning a digestion tank placed in a cleaning position for three times; a nine-way valve module for directly adding an acid for digestion and reaching a constant volume; a three-axis module used to suck, from a sample sending position, a solution in the digestion tank to put into a sample bottle placed in the heating module and move the digestion tank to the cleaning position; a constant volume reaching module for precise positioning of liquid surface and full transferring of the solution to a target position; and a control module. Wet digestion and microwave digestion are combined in one, the full-automatic inorganic sample pretreatment acid-removing volume metering instrument can independently process a wet digestion sample, by combination of the two methods, most of inorganic analytical samples can be processed, after digestion of the sample,the acid is removed, and the solution is diluted to a desired volume, and the full-automatic inorganic sample pretreatment acid-removing volume metering instrument can realize the full-automatic sample pretreatment.
Owner:SHANGHAI HUAZHI SPECTRUM INSTR
Novel method for measuring arsenic in urine
InactiveCN105954250AHigh speedSimple compositionFluorescence/phosphorescenceFluorescenceAtomic fluorescence spectrometry
The invention discloses a novel method for measuring arsenic in urine. AFS-230E double-channel atomic fluorescence photometer is used to quantitatively measure arsenic in urine by wet digestion-hydride generation atomic fluorescence method. Select the best instrument conditions, optimize the composition of the digestive solution, change the digestion instrument and digestion vessel in the process of sample pretreatment, standard curve drawing, sample determination and other experimental operations, reduce the concentration and dosage of reagents, and effectively shorten the The operation process and processing time of sample pretreatment are shortened, the sample detection range is broadened, and the detection limit is reduced, making it suitable for the determination of low arsenic, suitable arsenic and high arsenic in urine samples and the detection of arsenic in large quantities of urine samples. Compared with the prior art, the method of the present invention has the advantages of high precision, good sensitivity, accuracy and reliability, simplicity and quickness, less interference, wide linear range, strong practicability and low cost.
Owner:潘月华
Method for measuring metal element content in polycarbonate
ActiveCN104880454AFast transferImprove accuracyAnalysis by thermal excitationRoom temperatureRepeatability
The invention discloses a method for measuring metal element content in polycarbonate. The method mainly comprises the following steps: (1) wet digestion treatment of a sample, namely adding a sulfuric acid solution to a polycarbonate sample to be detected, and then performing heating of the first stage, when the solution turns to black, performing heating of the second stage, and meanwhile, adding hydrogen peroxide solution, and after the solution turns to a colorless and transparent solution from black, continuing heating until no bubble is generated in the solution, and then cooling the solution to room temperature for later use; (2) preparation of a sample solution; (3) preparation of a blank solution; (4) preparation of a standard solution; (5) drawing of a standard curve; (6) measurement of the metal element content. The method has the advantages of simple operation, safety, speediness, good repeatability, high accuracy and the like, and is suitable for measuring metal elements in similar substances.
Owner:LUXI CHEM GRP
Method for measuring selenium in food through combination of double cloud point extraction and hydride generation-atomic fluorescence spectroscopy
InactiveCN105021781ALow detection limitHigh densityFluorescence/phosphorescenceTesting foodLaminaria japonicaAtomic fluorescence spectrometry
The invention provides a method for measuring selenium in food through combination of double cloud point extraction and hydride generation (GG)-atomic fluorescence spectroscopy (AFS). The method comprises the following steps that firstly, a sample is digested through a wet method; secondly, primary cloud point extraction is carried out on the digested object obtained in the first step, then a mixed solution of HC1 and H2O2 is adopted as back-extractant, and secondary extraction is carried out to concentrate selenium; thirdly, the content of selenium in the sample is measured through the HG-AFS method. It is achieved for the first time that double cloud point extraction and the HG-AFS are applied to detection of the selenium in food in a combination mode, according to the method, the detection limit is 0.16 microgram / L, RSD is 4.04%, the method is high in accuracy and precision, the detection limit is low, and the method is especially suitable for measuring the trace selenium in the food such as spiral seaweeds, kelp and tea.
Owner:GUANGDONG PHARMA UNIV
Production process of high-activity desulfurizer slaked lime
ActiveCN111377621ALower conversion rateLarge particlesCalcium/strontium/barium oxides/hydroxidesMechanical crushingDigestion Treatment
The invention discloses a production process of a high-activity desulfurizer slaked lime. The production process comprises the following steps: S1, mechanically crushing quick lime blocks to obtain aquick lime particle raw material with the particle size of 2-10mm; S2, slaking the quicklime particle raw material and slaking water to obtain lime slurry; S3, supplementing a certain amount of quicklime raw materials into the lime slurry, stirring and digesting to obtain slaked lime granules; wherein in the step, the slaking temperature is 70-110 DEG C, the slaking time is 20-60 minutes, the useamount of the supplemented quicklime raw material accounts for 20-40% of the mass of the total lime, and the mass ratio of slaked water to slaked lime granules in the slaked lime granules is (0.6-1):1; and S4, performing impurity removal treatment and separation treatment on the slaked lime granules to obtain slaked lime powder with a desulfurization function. According to the method, a wet digestion process and a dry digestion process are combined, heat released by a digestion reaction is fully utilized, and the problems that slaked lime obtained through a traditional dry method is low in conversion rate, large in powder particle, adhesive, small in specific surface area and low in porosity are solved.
Owner:NANJING WEIHENG EXPERIMENTAL EQUIP CO LTD
Method for determining thallium content of agricultural product by flame atomic absorption spectrometry
InactiveCN104914061AQuality assuranceImprove applicabilityPreparing sample for investigationColor/spectral properties measurementsRelative standard deviationAgricultural engineering
The invention discloses a method for determining thallium content of an agricultural product by flame atomic absorption spectrometry. The method comprises the steps of carrying out sample digestion, drawing a work curve, testing a sample, weighing 2-5g (accurately 0.001g) of samples, adding mixed acid of nitric acid and perchloric acid (4+1), carrying out wet digestion, wherein the mass concentration and the absorbancy of thallium have good linear relationship. According to the method, the related coefficient is as follows: r is equal to 0.9999; the detection limit (3s / k) is 0.066mg / kg; the degree of precision is tested as follows: the digestion of the sample is carried out by the test method, seven times of parallel test of the sample is implemented, the result shows that the relative standard deviation of the thallium content of the sample measured by the method is between 1.6%-3.2%; the recovery rate of the added thallium standard solution is 91.6%-95.5%. According to the method, the thallium content of the agricultural product can be measured accurately and rapidly, the precision is good, the accuracy is high, the application effect is good, and the method provides the reference for the formulation of the detection standard of the thallium content of the food in China.
Owner:GUIZHOU INSPECTION & QUARANTINE TECH CENT
Method for detecting cadmium of enzyme preparation
InactiveCN103698293APreparing sample for investigationColor/spectral properties measurementsBiochemical engineeringBiology
The invention relates to the technical field of detection of biological preparations, in particular to a method for detecting cadmium of an enzyme preparation. The method comprises the following steps: (1) pretreating a sample and performing wet digestion on the sample; (2) preparing a standard curve; (3) measuring; (4) calculating the result. The method is verified through accuracy degree and precision degree (repeatability and reproducibility), the applicability of the enzyme preparations in different industries and the true value regression test of standard rice substances, and the method is a simple, convenient, reliable and accurate method.
Owner:WUHAN SUNHY BIOLOGICAL
Bos taurus domesticus gmelin ICP-MS identification method and application
ActiveCN108444985AFully reflect the chemical compositionFully reflect the characteristicsAnalysis by thermal excitationComputer scienceSperm
The invention relates to an identification method of animal calculus type traditional Chinese medicines, and specifically relates to a bos taurus domesticus gmelin ICP-MS identification method and application. The method comprises the following steps: performing wet digestion on known basic original bos taurus domesticus gmelin and different batches of bos taurus domesticus gmelin samples; performing ICP-MS detection to obtain data of 18 elements, including Li, Na, Mg, Al, P, S, K, Ca, Ti, V, Mn, Co, Ni, Cu, Zn, In, Ba and U; importing the detected data to SPSS 22.0 software; and carrying outclustering analysis. According to the method, a 'group-to-group connection' clustering method is carried out to form a tree-like clustering map through which whether the bos taurus domesticus gmelin to be detected belongs to the same species as the known basic original bos taurus domesticus gmelin; or the data are imported to the SIMCA-P 14.1 software, and PCA analyzing is carried out to obtain aPCA scatter diagram, and meanwhile, the uniform stability of the bos taurus domesticus gmelin of different batches and to be detected can be determined based on the gathering degree in the scatter diagram. Therefore, the species origin of the bos taurus domesticus gmelin is identified based on inorganic element; the uniform stability of the bos taurus domesticus gmelin at different batches can beidentified. The method is simple and quick.
Owner:SHANXI PROVINCE FOOD & DRUG INSPECTION INST
Method for determining mercury content in hair by DMA-80 direct mercury measuring instrument
InactiveCN110411817AReduce lossesReduce pollutionPreparing sample for investigationMaterial analysis by electric/magnetic meansPretreatment methodOrganic solvent
The invention discloses a method for determining the mercury content in hair by a DMA-80 direct mercury measuring instrument. The method comprises the following steps that (1) a sample is prepared bycutting and directly feed hair, or washing the hair with deionized water, immersing the hair by an organic solvent for 5-10min, air-drying the hair naturally, cutting the hair, and feeding the hair directly for analysis; and (2) the DMA-80 direct mercury measuring instrument is used for determination at the drying temperature of 50-100 DEG C and the decomposition range of 400-700 DEG C. Via the method of the invention, pretreatment including microwave digestion or wet digestion is not needed, mercury loss due to a pretreatment method is reduced, operation is simple, pollution is less, detection is rapid, and the accuracy and precision are higher.
Owner:SOUTHERN MEDICAL UNIVERSITY
Batch transfer constant volume device of wet digestion type digestion solution and control module thereof
PendingCN106289432ABulk transfers are fully reliableEfficient batch transferVolume measurement apparatus/methodsPreparing sample for investigationWater storageComputer module
The invention provides a batch transfer constant volume device of a wet digestion type digestion solution. The batch transfer constant volume device is characterized in that a water storage bucket is connected with a water separator through a silica gel tube, and a vacuum pump is arranged on the silica gel tube; the water separator is connected with two or more than second silica gel tubes, a spray cleaning head is arranged at the tube head of each second silica gel tube, the spray cleaning heads extend to boiling tubes, and two or more boiling tubes are arranged; each spray cleaning head corresponds to one digestion solution suction tube, the digestion solution suction tubes extend to the boiling tubes, and two or more digestion solution suction tubes are arranged; and the digestion solution suction tubes are connected with constant volume tubes by polytetrafluoroethylene tubes, and two or more polytetrafluoroethylene tubes are arranged. By adoption of the batch transfer constant volume device of wet digestion type digestion solution and the control module thereof, provided by the invention, batch constant volume transfer of the wet digestion type digestion solution can be realized.
Owner:JIANGSU ACAD OF AGRI SCI
Method for determining sodium content in food by sub sensitivity line atom absorption spectrum
PendingCN107219176AReduce lossesSimplify operating proceduresPreparing sample for investigationColor/spectral properties measurementsPretreatment methodDigestion
The invention belongs to the technical field of a food detection method, particularly relates to a method for determining the sodium content in food by a sub sensitivity line atom absorption spectrum. The method comprises the following steps of 1, sample digestion; 2, determination: (1) setting the parameters of an atomic absorption spectrometer, wherein the absorption wavelength of the atomic absorption spectrometer is set to be 330.24nm; (2) drawing a standard curve; (3) sodium content determination. Compared with the prior art, the method provided by the invention has the advantages that a sample pretreatment method is improved; a microwave digestion method is increased and optimized for replacing wet process digestion, so that the pretreatment is safe, convenient, fast and efficient. Through the use of the sub sensitivity line (330.24 nm) of sodium elements, the work conditions of an instrument is regulated and optimized; the determination is performed by a flame atom absorption spectrum method; the linear range is wide (1 to 50 mug / mL); the accuracy is high; the sample does not need to be diluted for many times; the sample mass detection efficiency is greatly improved.
Owner:广东省中鼎检测技术有限公司
Novel cement kiln semi-dry desulfurization system
PendingCN106215678ALow investment costLow running costGas treatmentDispersed particle separationCycloneSlurry
The invention provides a novel cement kiln semi-dry desulfurization system. The system comprises a No.1 cement kiln cyclone and a No.2 cement kiln cyclone, which are vertically arranged in sequence and are connected together by a pipeline, wherein a discharge pipe is arranged at the bottom of the No.2 cement kiln cyclone; the lower part of the discharge pipe is connected with a raw material silo, a lime slurry wet digestion tank, a lime slurry storage tank and a slaked lime water atomized spray system by a pipeline in sequence; the tail end of the slaked lime water atomized spray system is connected with a preheater arranged on the No.1 cement kiln cyclone by a pipeline. The novel cement kiln semi-dry desulfurization system has the beneficial effects that the system can achieve more than or equal to 70% of desulfurization efficiency, belongs to the semi-dry desulfurization technology, combines the advantages of a dry reactant injection method and the spray drying desulfurization technology, overcomes the defects of the dry reactant injection method and the spray drying desulfurization technology and can not cause other pollution; meanwhile, reactants are derived from hot raw materials, thus reducing the investment costs and operating costs of traditional desulfurization processes.
Owner:中材国际环境工程(北京)有限公司
Pretreatment method for solid food sample based on ionic liquid
ActiveCN110567775AReduce dosageAvoid enteringPreparing sample for investigationColor/spectral properties measurementsPretreatment methodSolid food
The invention provides a pretreatment method for a solid food sample based on ionic liquid, and the method comprises the following steps: contacting the ionic liquid with a to-be-treated solid food sample, performing heating under the condition of concentrated HNO3 until the sample is completely dissolved, adding deionized water, and performing filtering. Compared with wet digestion, the pretreatment method established by the invention has the advantages that the pretreatment time can be shortened by 36-48 times, and the dosage of the acid liquor is reduced by 12-20 times, so that a green, safe and rapid pretreatment technology in heavy metal ion detection and analysis of the food solid sample is provided.
Owner:武汉海关技术中心
A kind of color-coated board pretreatment film weight determination method
ActiveCN102297814AMake sure to peelStrong digestion abilityPreparing sample for investigationMaterial weighingPretreatment methodPhysical chemistry
The invention relates to a color-coated plate, in particular to a pretreatment method for detecting a color-coated plate. A method for measuring the pretreatment film weight of a color-coated plate, which includes the following steps: a sample sealing step: using a rubber sample dissolving cup with a large inner diameter and a small rubber sample cup to seal the non-measurement surface; the sample stripping step: using hydrochloric acid-hexamethyl Tetraamine corrosion inhibition system, the pretreatment film is peeled off together with the coating, and the substrate itself is not corroded and dissolved at this time; the digestion sample step: use nitric acid and hydrogen peroxide wet digestion to transfer all the components to be measured into the solution to make a test solution; pretreatment film weight measurement steps: use ICP-AES or FAAS method to measure the pretreatment film weight of the color-coated board. The method of the invention is simple and easy to seal the sample, the measurement result is accurate, and the prepared measurement solution can meet the requirements of certain measurement techniques (such as ICP-AES, FAAS, etc.) to measure the weight of the pretreatment film.
Owner:SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
Method for measuring Pb/Dc content in polluted soil remediation plant Calendula officinalis by ICP-OES (inductively coupled plasma and optical emission spectrometry)
InactiveCN105572101AHigh precisionThe measurement result is accurateAnalysis by thermal excitationOptical emission spectrometryPollution
A method for measuring Pb / Dc content in polluted soil remediation plant Calendula officinalis by ICP-OES (inductively coupled plasma and optical emission spectrometry) comprises: sowing seeds of Calendula officinalis in prepared Pd / Cd combination polluted soil, spraying a mixed solution of DETA (ethylene diamine tetraacetic acid) and tartaric acid to potting soil 35 days after seedlings emerge, removing seedlings with root after 50 days, washing with water and drying, dividing each seedling of Calendula officinalis into an overground part and an underground part, grinding the overground part and the underground part into powder A and powder B, respectively, and treating the powder A and the powder B separately by wet digestion to obtain a digested solution; detecting the digested solution by using an ICP-OES instrument. The invention provides simultaneous detection for various elements, is simple to perform and has low cost, and uses few samples, enabling a great increase in detection efficiency and time saving; changes in the heavy metal content in the remediation plant Calendula officinalis is determined through the method, and the method is of great significance to the treatment of soil pollution.
Owner:SHAANXI UNIV OF SCI & TECH
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