94results about How to "The preprocessing method is simple" patented technology

The invention provides a method for identifying HPLC fingerprints for protecting ginseng of origin, which is characterized by comprising the following steps: A, establishing liquid phase chromatograph fingerprints of the ginseng of origin, namely using the ginseng in the same habitat as a standard, analyzing the ginseng by liquid phase chromatograph and establishing fingerprints; and B, detecting a sample, namely taking a ginseng sample to be detected, detecting the sample under the same conditions as the standard respectively to obtain a spectrogram of the detected sample, and analyzing the fingerprints of the detected sample and the standard by a direct observational method or fingerprints software as qualitative basis. The method has simple pretreatment for fingerprints of the ginseng medicinal material established by adopting the liquid phase chromatograph, multiple peak numbers and better separation degree, therefore, contents of main chemical compositions of the ginseng medicinal material have large difference caused by different growing geographic environments and climates. The HPLC fingerprints of the ginseng can provide reference for distinguishing high-end ginseng health-care products from origin places and non-origin places, and provide reference for establishing fingerprints of other traditional Chinese medicinal materials. The research of methodology shows that all the precision, the stability and the repeatability have better application prospect.

The invention discloses a preparation method of sucrose ester, which belongs to the technical field of non-ionic surfactants. The method comprises the following steps of: removing a small amount of water and free fatty acids out of fatty acid methyl ester at first, and then adding a solid catalyst in the water-removed fatty acid methyl ester, mixing uniformly and adding sucrose in a certain ratio. In the existing industrial preparation of sucrose ester, an alkali metal hydroxide is commonly used as a catalyst, and subsequent product purification steps are cumbersome, and lots of wastewater is generated; however, according to the preparation method disclosed by the invention, a common industrial alkaline earth metal oxide is used as the solid catalyst, the reaction conditions are moderate, and the solid catalyst is not left in the product, can be repeatedly utilized and is environment-friendly and thus cost is reduced.

The invention proposes a method for preprocessing screen printing carbon electrodes, which is characterized in that the method comprises a chemical treatment method and a treatment method which combines chemistry and electrochemistry, wherein the chemical treatment method comprises: dipping the screen printing carbon electrodes into strong alkaline solution with high concentration for certain time, while the treatment method which combines the chemistry and the electrochemistry comprises: dipping the screen printing carbon electrodes into strong alkaline solution with high concentration and then activating the electrodes which is dipped with constant potential in alkaline solution with low concentration. Compared with other methods for preprocessing the printing carbon electrodes, the reversibility of electrode and electron transfer rate are prominently intensified after processing by the method for preprocessing which is adopted by the invention, the charge-transfer resistance is greatly reduced, the active area of the electrodes is increased by more than ten times, simultaneously, the response to small biological molecules (such as dopamine) is enlarged by more than thousands of times. The method for preprocessing is simple, operations are convenient, and reagent which is used is very cheap and easy to obtain.

The invention discloses a pretreatment method of rubber ingredient production wastewater. The rubber ingredient production wastewater is M wastewater, DM wastewater and CBS wastewater. A liquid film separation technique is utilized to pretreat the M wastewater, a complex extraction technique is utilized to pretreat the DM wastewater, and a liquid film separation technique is utilized to pretreat the CBS wastewater. The invention provides the treatment technique of every type of production wastewater in the field of rubber ingredient production wastewater for the first time. The method is simple, has the advantages of high treatment efficiency and stable operation, is beneficial to energy saving and environment friendliness, and has obvious environmental benefits.

The invention discloses a DGT / LA-ICP-MS based analysis method of sediment void water metal element micro-area distribution. The method comprises the steps that an internal standard 115In element is fixed to DGT; then fixing glue acting on 115In plays action in a metal standard solution to be tested to get standard to-be-tested metal element fixing glue; LA-ICP-MS analysis is conducted on the standard to-be-tested metal element fixing glue to make a DGT-standard to-be-tested metal element curve; then the DGT probe to which the internal standard 115In is fixed is put into a sediment for testing, the LA-ICP-MS analysis is performed, and a DGT-to-be-tested metal image is drawn. A DGT fixing glue internal standard 115In treatment method is simple, the LA-ICP-MS analysis is conducted by using the single-layer fixing glue, the analysis precision and accuracy are improved, multiple metal elements can be analyzed simultaneously, and the high-quality metal element chemistry image can be obtained.

The invention discloses a preparation method of using carbide slag to produce different micro-and ultra-fine calcium carbonate of various crystal forms, belonging to the calcium carbonate. The method comprises four steps: the first step is the pretreatment of the carbide slag; the second step is the preparation of the calcium chloride solution; the third step is the metathesis reaction for the preparation of micro-and ultra-fine calcium carbonate; the fourth step is to filter and dry. The preparation method has the advantages that (1) the problem of environmental pollution brought by the emission of the carbide slag is solved; (2) since NH4C is not used for the preparation of calcium carbonate, the problem of environmental pollution caused by the NH3 is solved; (3) using HCI to react with carbide slag makes Ca(OH)2 in the carbide slag and CaCO3 generated after the carbonation of carbide slag by air both transfer into CaCl2, improving the recovery rate of the carbide slag; (4) adopting the method of mixing directly the carbide slag and water and preparing the mixture into slurry, instead of traditional drying or high-temperature calcinations pretreatment, reduces the energy consumption in the pretreatment of the carbide slag. The preparation method is suitable for the enterprises using large amount of calcium carbide, in particular to the chloral-alkali enterprises with the PVC production line.

The invention provides a method for detecting a chemical formula in an image based on characteristics of a chemical formula. According to the method of the invention, gray scale transformation, binarization and dividing are performed on a random text image; and chemical formula detection is performed through two aspects of divided characters and a whole image. The method for detecting the chemical formula comprises the steps of determining single / double bonds, matching a template, determining an image pixel density and determining phenyl ring, wherein the divided characters are detected in determining single / double bonds and matching the template, and the whole image is detected in determining the image pixel density and determining the phenyl ring. Detection by four modules is performed on the image successively. If detection by a certain module is satisfied, a fact that the image is a Chemical formula image is determined. According to the method of the invention, detection is mainly performed according to the common character characteristic of the chemical formula and writing structure characteristics; and detection is performed through the projection characteristic of the character, the image density and the structure characteristic of the character. The method has advantages of easy realization, low requirement for conditions such as image resolution and correct degree, and high identification rate.

The invention discloses a treatment method of a natural graphite material, a natural graphite material treated by the method and application of the natural graphite material. The treatment method of the natural graphite material comprises the following steps: (1) drying the natural graphite material until the mass percent of moisture is less than or equal to 1%, and then grinding at a rotating speed of 20000-25000r / min for 5-10 minutes; (2) mixing the material obtained in the step (1) for 90-150 minutes, and then sieving. The treatment method is capable of obviously reducing the specific surface area of the natural graphite material without affecting the original particle size distribution of the material, and as a result, the material morphological regularity of the material is increased, the development of the discharge capacity and the efficiency is not affected, the processability and the sieving performance are improved, the material is good in safety and stable in property, and almost no difference exists between batches.

The invention provides a method for identifying HPLC fingerprints for protecting ginseng of origin, which is characterized by comprising the following steps: A, establishing liquid phase chromatograph fingerprints of the ginseng of origin, namely using the ginseng in the same habitat as a standard, analyzing the ginseng by liquid phase chromatograph and establishing fingerprints; and B, detectinga sample, namely taking a ginseng sample to be detected, detecting the sample under the same conditions as the standard respectively to obtain a spectrogram of the detected sample, and analyzing the fingerprints of the detected sample and the standard by a direct observational method or fingerprints software as qualitative basis. The method has simple pretreatment for fingerprints of the ginseng medicinal material established by adopting the liquid phase chromatograph, multiple peak numbers and better separation degree, therefore, contents of main chemical compositions of the ginseng medicinal material have large difference caused by different growing geographic environments and climates. The HPLC fingerprints of the ginseng can provide reference for distinguishing high-end ginseng health-care products from origin places and non-origin places, and provide reference for establishing fingerprints of other traditional Chinese medicinal materials. The research of methodology shows that all the precision, the stability and the repeatability have better application prospect.