36results about How to "Meet the detection requirements" patented technology

The invention relates to a metagenome sample library construction method and an identification method based on a nanopore sequencing platform and a kit. The method comprises host removal pre-treatmentand sample library construction on human and animal metagenome samples by combining incomplete host removal based on the nanopore sequencing platform so as to sequence and identify the metagenomes. Compared with a conventional process flow, the method is simpler and rapider, meets the reasonable detection demands, omits flows such as library construction PCR in the identifying process, extrudes deviation caused by PCR amplification, and can be used for identifying metagenome microorganisms more truly and accurately.

The invention discloses an In2O3@ZnIn2S4 nanosheet material and a preparation method and application thereof. The method comprises the following steps: dissolving indium oxide in acidic water to obtain an indium oxide solution; and then adding zinc chloride, indium trichloride and thioacetamide into the indium oxide solution for a reaction; and carrying out washing and drying to obtain the In2O3@ZnIn2S4 nanosheet material, wherein a molar mass ratio of indium oxide to zinc chloride to indium trichloride to thioacetamide is 1: 2: 2: 5. The preparation method for the In2O3@ZnIn2S4 nanosheet material in the invention is simple and convenient in operation and low in cost; the prepared photocatalyst material, i.e., the In2O3@ZnIn2S4 nanosheet material, has extremely high targeting properties and degradation efficiency, and the degradation rate of 2,4-dichlorophenol in surface water can reach 93.2%; and the photocatalyst material can be recycled and still has high degradation rate after being used multiple times, so the treatment cost of 2,4-dichlorophenol is greatly reduced. Treatment with the photocatalyst material is efficient and energy-saving, and can meet national detection requirements on 2,4-dichlorophenol in surface water in China.

The invention relates to a bronchoalveolar lavage fluid sample library building method based on a nanopore sequencing platform, an identification method and a kit. According to the method, based on the combination of the nanopore sequencing platform and incomplete host removal, host removal pretreatment and sample library building are carried out on metagenome samples of human bodies and animal bodies, and then used for sequencing identification of metagenomes. Compared with the traditional process, the method provided by the invention is simpler and faster, meets the reasonable detection requirements, omits the processes of library building PCR and the like in the identification process, eliminates the bias caused by PCR amplification, and can more truly and accurately identify the metagenome microorganisms.

The invention discloses a chromium-doped titanium oxygen cluster nano catalytic material, a preparation method and applications thereof. The preparation method comprises the following steps: preparingtitanium oxygen cluster powder by taking pivalic acid as a precursor; and then adding the titanium oxygen cluster powder and chromium chloride into tetrabutyl titanate, carrying out ultrasonic dissolution, and reacting under a boiling condition to prepare the chromium-doped titanium oxygen cluster nano catalytic material, wherein a mass ratio of the titanium oxygen cluster powder to the chromiumchloride is (6-8):1. The chromium-doped composite titanium-oxygen cluster nano catalytic material prepared by the invention has the advantages of low technical cost, environmental friendliness, easiness in operation, high degradation efficiency and multiple types of degraded tetracycline, and overcomes the defects of poor quantum efficiency, poor visible light absorption efficiency, easiness in photo-induced charge combination and the like of the single-molecule photocatalyst. The titanium oxygen cluster compound has a large specific surface area, is easy to form a vacuum position under an illumination condition, has more pores and has high catalytic performance.

The invention discloses a nickel-doped titanium oxygen cluster nano catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing titanium oxygen cluster powder by taking pivalic acid as a precursor; then adding titanium oxygen cluster powder and nickel chloride into water to be dissolved and irradiating with a mercury lamp, and reacting to obtain the nickel-doped titanium oxygen cluster nano catalytic material. The mass ratio of the titanium oxygen cluster powder to the nickel chloride is 20-30: 1. The prepared nickel-doped composite titanium oxygen cluster nano catalytic material has a series of outstanding advantages that the photocatalytic oxidation technology is low in cost, environmentally friendly, easy tooperate and high in degradation efficiency, and the variety of degraded tetracycline is large; the composite photocatalyst overcomes the defects of poor quantum efficiency, poorer visible light absorption efficiency, easiness in photo-induced charge combination and the like of a single-molecule photocatalyst; the titanium-oxygen cluster compound has a large specific surface area, is easy to forma vacuum position under an illumination condition, has more pores and has high catalytic performance.

The invention discloses an aqueous two-phase system and application of same to separation of vitamin B6 in sunflower seeds of same. The aqueous two-phase system is prepared from, by mass, 30-40% of N-ethyl pyridine nitrate ion liquid, 20-30% of ammonium citrate and the balance water, wherein the sum of the mass ratio of the N-ethyl pyridine nitrate ion liquid, the ammonium citrate and the water is 100%. The aqueous two-phase system has the advantages of being wide in linearity range, low in checkout limit, small in relative deviation and high in detection recovery rate of samples; the checkout requirement for residual vitamin B6 of the nation can be met, meanwhile, operation is simple, and the aqueous two-phase system is applicable to quantitative analysis of vitamin B6 in sunflower seeds.

The invention discloses a dimethyl hydrazine adsorption material in automobile exhaust, and a preparation method and application thereof. The method specifically includes: mixing nitrogen ethylpyridinium nitrate, sodium sulfate and polyacrylamide-triethanolamine graft chelate gel in a mass ratio of 1:7:2, and burning the mixture to obtain an ionic liquid active adsorbent material, wherein the burning temperature is 120-150 DEG C. The method for preparing the adsorbent material has the advantages of rapid and convenient preparation, usage of the special ionic liquid, salt and graft chelate gelin preparation; and the prepared adsorbent material has high targeting property and collection efficiency, and has permeability of dimethyl hydrazine in automobile exhaust reaching 98.9%, wide linearrange, low detection limit and relatively small standard deviation, and can meet the national requirements for detection of dimethyl hydrazine in automobile exhaust.

The invention discloses a quality standard detection method for crude drug 20(R)-ginsenoside Rg3. The method includes: 1) identifying 20(R)-ginsenoside Rg3; 2) determining the content of 20(R)-ginsenoside Rg3; and 3) detecting related substances. The method provided by the invention is mainly used for quality control of 20(R)-ginsenoside Rg3 crude drug and its preparations, has the characteristics of simplicity, stability and good repeatability, is conducive to improving the inspection efficiency, and ensures the treatment effect of 20(R)-ginsenoside Rg3 crude drug and preparations.

The invention provides a high-precision mode-preserving optical fiber polarized light seismic gyroscope realized based on quantum weak measurement. The polarized light seismic gyroscope comprises a light emitting diode, a Gaussian filter, a semi-reflecting and semi-transmitting mirror, a first polarization controller, a polarization beam splitter, a SOLEIL-BABINET compensator, a second auto-collimating lens, a first auto-collimating lens, a polarization maintaining optical fiber ring, a second polarization controller, a first spectrograph, a second spectrograph, an AD acquisition module, an FPGA data processing module, a DA conversion module and an LED display screen display and USB storage module. Polarized light is transmitted to the FPGA data processing module after being acquired by the AD acquisition module, the processed spectrum is compared with the initial spectrum, the movement of the central wavelength is calculated, the relationship between the movement of the central wavelength and the rotation angular velocity of the seismic gyroscope is further obtained, and the purpose of detecting the polarized light of the high-precision mode-preserving optical fiber through weak measurement is achieved. The polarized light seismic gyroscope has the beneficial effects that the spectral measurement based on the frequency domain has higher signal-to-noise ratio and sensitivity.

The invention discloses a corn ochrarin absorbing material and preparation and application methods thereof. The preparation method of the corn ochrarin absorbing material comprises mixing and firing tetrabutyl ammonium chloride, sodium sulfate and polyacrylamide-tetraethylenepentamine grafted chelating gel, during which the firing temperature is 120-150 DEG C, and the weight ratio of tetrabutyl ammonium chloride, sodium sulfate and polyacrylamide-tetraethylenepentamine grafted chelating gel is 1:7:2. The preparation method of the corn ochrarin absorbing material is rapid and convenient and applies special ion solution, salt and the grafted chelating gel, so that the prepared corn ochrarin absorbing material can achieve high targeting property and capturing efficiency. The corn ochrarin absorbing material achieves a corn ochrarin permeating rate up to 99.2% and is wide in linear range and low in detection limit and relative standard deviation, and can meets the national requirements oncorn ochrarin.

The invention discloses a cowpea N-methyl xylene carbamate adsorbing material, preparation and application. Ionic liquid [EPy]Br, Na2HPO4 and TEDA-PAM-Gel are mixed and react by the aid of a sol-gel method to prepare the morning-glory-shaped ionic liquid activated adsorbing material. Reaction temperature ranges from 150 DEG C to 170 DEG C, and the mass ratio of the ionic liquid [EPy]Br, the Na2HPO4 to the TEDA-PAM-Gel is 1:6:3. The adsorbing material is rapidly and conveniently prepared by the aid of the special ionic liquid, salt and grafted chelate gel, and the prepared morning-glory-shapedionic liquid activated adsorbing material has high targeting ability and collection efficiency, the recovery rate of cowpea N-methyl xylene carbamate can reach 99.5%, and the method has a wide linearrange, low detection limit and small relative standard deviation and can meet the national requirement of cowpea N-methyl xylene carbamate detection.

The invention relates to a method for detecting inositol in food, and belongs to the field of food chemical detection. The method for detecting inositol in food comprises the following steps of: mixing to-be-detected food, water and ethanol to prepare a food detection solution; detecting the food detection solution by using an ultra-high performance liquid chromatography-mass spectrometer to determine whether the food detection solution contains inositol or not; and if the food detection solution contains inositol, taking sorbitol as an internal standard substance, and detecting the food detection solution by adopting an internal standard method so as to determine the content of inositol in the to-be-detected food. The method for detecting inositol in food can be used for efficiently and accurately detecting whether food contains inositol and detecting the content of inositol.

The invention discloses a bactericide pyrimethanil adsorption material and a preparation method and application thereof. The method includes: mixing N-buthylpyridine chlorine salt, sodium carbonate and polyacrylamide-hexamethylenetetramine grafted chelated gel, and burning at a temperature of 120 DEG C to obtain the adsorption material, wherein a mass ratio of N-buthylpyridine chlorine salt to sodium carbonate to polyacrylamide-hexamethylenetetramine grafted chelated gel is 2:6:2. The preparation method of the adsorption material is quick and convenient; by adoption of the special ionic liquid, salt and grafted chelated gel in preparation, the prepared adsorption material is high in targeting performance and collection efficiency. By adoption of the method, the recovery rate of pyrimethanil in bactericide reaches 99.2%, wide linear range, low detection limit and low relative standard deviation are realized, and the national requirement on detection of pyrimethanil in bactericide can bemet.

The invention discloses a lead ion adsorption material for automobile tail gas, and a preparation method and an application thereof; nitrobutyl pyridine nitrate, ammonium citrate and polyacrylamide-dithizone grafted chelate gel are mixed and burned to obtain a product, wherein the burning temperature is 150-170 DEG C, and the mass ratio of nitrobutyl pyridine nitrate to ammonium citrate to the polyacrylamide dithizone grafted chelate gel is 2:5:3. The ionic liquid active adsorption material is prepared. The preparation method of the adsorption material is fast and convenient, a special ionic liquid, salt and grafted chelate gel are used during preparation, and the prepared filamentous ionic liquid active adsorption material has high targeting property and trapping efficiency; according tothe method, the permeability rate of lead ions in automobile tail gas can reach 99.6%. The method has the advantages of wide linear range, low detection limit and small relative standard deviation, and can meet the national requirements for detection of the lead ions in the automobile tail gas.

The invention provides a sample disc suitable for a halogen moisture meter to measure the moisture content of tobacco coated seeds and a method for measuring the moisture content of the tobacco coatedseeds in the halogen moisture meter by using the sample disc. The sample disc provided by the invention comprises a clamping groove and a base, the clamping groove is a half-surrounded clamping groove, the base is fixed on the clamping groove, and a semispherical concave hole is formed in the base. The sample disc can be used for simply, quickly and accurately sampling tobacco coated seeds; besides, specific parameters and modes of the halogen moisture tester are selected, and the method is simple to operate, short in detection time, accurate in detection result, good in repeatability and small in error.

The invention discloses a geological radar detection surface adapting device and method for tunnel advanced geological forecast. The geological radar detection surface adapting device comprises a carrying platform, a clamping mechanism, an adapting mechanism and a moving mechanism, a clamping mechanism and an adapting mechanism are arranged on one side of the carrying platform, and a moving mechanism is arranged on the other side of the carrying platform; the clamping mechanism comprises a clamping plate used for fixing a radar antenna, the adapting mechanism comprises an elastic part and an adapting mechanical wheel set, the elastic part and the adapting mechanical wheel set are connected with the clamping plate, and the elastic part is used for applying external force to the adapting mechanical wheel set so as to adjust the radar antenna to move along a measuring line by adjusting the position of the adapting mechanical wheel set. The adaptive mechanism of the combined structure of the spring and the adaptive mechanical wheel set is adopted to adjust the attachment of the radar antenna and the detection surface, so that the radar antenna moves along the detection line, thereby facilitating the receiving of signals, and being suitable for the detection of various types of geological radars such as tunnel faces, secondary linings and the like.

The invention discloses a milk dienestrol adsorption material and a preparation method and application thereof. The method includes: mixing 1-methyl-3-buthylimidazole chlorine salt, ammonium sulfate and polyacrylamide-ethanol amine grafted chelated gel, and burning at a temperature of 120-150 DEG C to obtain the adsorption material, wherein a mass ratio of 1-methyl-3-buthylimidazole chlorine saltto ammonium sulfate to polyacrylamide-ethanol amine grafted chelated gel is 1:7:2. The preparation method of the adsorption material is quick and convenient; by adoption of the special ionic liquid, salt and grafted chelated gel in preparation, the prepared adsorption material is high in targeting performance and collection efficiency. By adoption of the method, the recovery rate of dienestrol inmilk reaches 99.5%, wide linear range, low detection limit and low relative standard deviation are realized, and the national requirement on detection of dienestrol in milk can be met.

The invention discloses an adsorption material of 2,4-embutox in chernozem, a preparation method and an application thereof. The method comprises the following steps: potassium dihydrogen phosphate, polyacrylamide-diisopropanolamine grafting chelated gel and tetrabutyl phosphorus chloride are mixed, and a mixture is subjected to calcination; the calcination temperature is 120-150 DEG C; and the mass ratio of the potassium phosphate, the polyacrylamide-diisopropanolamine grafting chelated gel to tetrabutyl phosphorus chloride is 7:2:1. The method for preparing the adsorption material of the invention is quick and convenient, the special ionic liquid, the salt and the grafting chelated gel are used in the preparation, the prepared ionic liquid active adsorption material has high targeting property and capture efficiency, and the permeability of 2,4-embutox in chernozem can reach 99.6%. The adsorption material has wide linear range, low detection limit and relatively small standard deviation, which can meet the national requirements for detection of 2,4-embutox in chernozem.

The invention discloses a rice cyhalothrin adsorption material and a preparation method and application thereof. The method includes: mixing 1-methyl-3-buthylimidazole bromide, dipotassium phosphate and polyacrylamide-diethylenetriamine grafted chelated gel, and burning at a temperature of 120-150 DEG C to obtain the adsorption material, wherein a mass ratio of 1-methyl-3-buthylimidazole bromide to dipotassium phosphate to polyacrylamide-diethylenetriamine grafted chelated gel is 1:8:1. The preparation method of the adsorption material is quick and convenient; by adoption of the special ionicliquid, salt and grafted chelated gel in preparation, the prepared coral-shaped ionic liquid activated adsorption material is high in targeting performance and collection efficiency. By adoption of the method, the adsorption rate of cyhalothrin in rice reaches 99.5%, wide linear range, low detection limit and low relative standard deviation are realized, and the national requirement on detection of cyhalothrin in rice can be met.

The invention discloses a preparation method of a soil cadmium removal blocking agent, which comprises the following steps: 1, adding polyacrylamide gel into distilled water, and regulating the pH value to 1-2 to obtain a mixed solution I; 2, adding a formaldehyde solution into the mixed solution I to carry out hydroxymethylation reaction to obtain a mixed solution II; and 3, adding a 2-chlorobenzylamine solution into the mixed solution II, and carrying out a grafting reaction to obtain the soil cadmium removal blocking agent. The soil cadmium removal blocking agent provided by the invention can introduce groups for capturing cadmium ions into a flocculating agent structure, so that the flocculating agent has two properties of reacting with the cadmium ions and flocculating at the same time, and a practical method for effectively removing the cadmium ions can be obtained. According to the preparation method, the synthesis conditions are easy to master, the cadmium removal efficiency ishigh, the residual amount of cadmium is low, the removal rate of cadmium ions in soil can reach 99.8%, and the national detection requirement for cadmium ion pollutants in soil can be met.

The invention provides a method for simultaneously determining the contents of gold, silver, platinum and palladium in low nickel matte and application, and particularly relates to the technical field of precious metal determination. The method for simultaneously determining the contents of gold, silver, platinum and palladium in low nickel matte comprises the following steps: A, sequentially adding nitric acid and sulfuric acid into the low nickel matte for dissolving to obtain a first solution; B, adding soluble chlorine salt into the first solution, filtering to obtain a first precipitate, and ashing the first precipitate to obtain a first ashing substance; C, uniformly mixing the first ashing substance with lead oxide, a flux and a reducing agent to obtain a to-be-melted substance, melting the to-be-melted substance, and cooling and separating the substance after melting to obtain a lead buckle and molten slag; D, performing soot blowing on the lead buckle to obtain combined particles, and dissolving the combined particles to obtain a solution to be measured; E, measuring the contents of gold, silver, platinum and palladium in the solution to be measured on an inductively coupled plasma emission spectrometer. The method is convenient to detect, high in sensitivity, low in detection limit and good in stability.

The invention discloses a preparation method of a soil lead removal blocking agent. The preparation method comprises the following steps: step 1, taking a 4-methoxybenzamide solution, and adjusting the pH value to 9-10 to obtain a mixed solution I; step 2, adding a formaldehyde solution into the mixed solution I to carry out hydroxymethylation reaction to obtain a mixed solution II; step 3, diallyl amine is added into the mixed solution II for a grafting reaction to obtain the soil lead removal blocking agent. Groups for capturing lead ions can be introduced into the structure of a flocculating agent, the flocculating agent has the two properties of reacting with the lead ions and flocculating at the same time, an effective practical method for removing the lead ions can be obtained. According to the preparation method, the synthesis conditions are easy to master, the lead removal efficiency is high, the lead residue amount is low, the removal rate of lead ions in soil can reach 92.0%,and the national detection requirement for lead ion pollutants in soil can be met.

The invention discloses an adsorption material for 2,4-dichlorophenoxyacetic acid in wheat and a preparation method and application of the adsorption material. The method includes the step that tetrabutylammonium bromide, sodium acetate and polyacrylamide-dimethylacetamide grafted chelated gel are mixed to prepare the adsorption material through a sol-gel method, wherein the reaction temperature is 150-170 DEG C, and a mass ratio of tetrabutylammonium bromide to sodium acetate to polyacrylamide-dimethylacetamide grafted chelated gel is 8:1:1. The preparation method of the adsorption material is quick and convenient; by adoption of special ionic liquid, salt and grafted chelated gel in preparation, the prepared triangular ionic liquid active adsorption material is high in targeting and collecting efficiency, and the recovery rate of 2,4-dichlorophenoxyacetic acid in wheat reaches 98.9%. In addition, the adsorption material is wide in linear range, low in detection limit and low in relative standard deviation, and the national detection requirement of 2,4-dichlorophenoxyacetic acid in wheat can be met.