43results about How to "Convenient qualitative analysis" patented technology

The invention provides a polysiloxane-based nuclear magnetic resonance spectrum mixture analysis method, which comprises the following steps: employing polysiloxane as an additive, performing separation analysis on components in a liquid mixture in a liquid nuclear magnetic resonance spectroscope by utilizing two-dimensional diffusion-ordered spectroscopy technology, and performing baseline separation on a nuclear magnetic resonance signal of each component on a diffusion dimension to obtain the molecular structure information of each component according to different diffusion coefficients of the components. According to the method, the molecular structure of each component in the mixture can be conveniently, rapidly and qualitatively analyzed, a nuclear magnetic resonance experiment is environment-friendly and pollution-free, and the method has a high scientific research value and a high practical application value.

The invention discloses a variable parameter combination Brazilian splitting stress-strain test device. The device comprises a data acquisition system, and also comprises two loading structures symmetrically arranged on an upper part and a lower part of a Brazilian splitting sample, the loading structure comprises a steel structure outer loop and at least a loading arc block, and the loading arc block is fixed on the steel structure outer loop. The invention also discloses a variable parameter combination Brazilian splitting stress-strain test method. According to the test device and the test method, tensile strength of rock brittle materials with different friction coefficients and different loading angles can be tested, the obtained data is accurate and reliable, combination of different impact factors can be carried out, and operation is simple.

The invention discloses a method for rapidly screening active ingredients of drugs based on an ultrafiltration-liquid chromatography-mass spectrometry. The method comprises the steps of dissolving a small molecular mixture of traditional Chinese medicine extract or other sources in a buffer solution, and adding enzyme for co-incubation; filtering the solution by ultracentrifugation concentration,repeating the filtering for multiple times, merging concentrated solutions, and making up the volume by the buffer solution; and analyzing the change of a chromatographic peak after the co-incubationof the enzyme by adopting a liquid chromatography-mass spectrometry technology. The method disclosed by the invention has the advantages that the hypoglycemic activity ingredients of the traditional Chinese medicines are screened by virtue of the ultrafiltration-UPLC-MS; and an experiment result shows that the method can carry out preliminary rapid screening on active small molecule compounds of anatural source in the complex ingredients. The method has the characteristics of simple operation, rapid batch screening, good experiment repeatability, visual and reliable experiment data and the like; and a new idea and method is provided for pharmacodynamic material basis research of the traditional Chinese medicines or the compounds.

The invention discloses a method of enhancing network capacity, comprising five procedures: A. a line between two nodes which have no connections is added, the sum of Betweenness of the whole network and standard deviation of Betweenness of the whole network are counted; B. the procedure A is repeatedly carried out, with every mode of adding a line between two nodes which have no connections, the sum of Betweenness of the whole network and standard deviation of Betweenness of the whole network are respectively counted; C. whether a line-adding mode exists is judged, if exists, then a procedure D is carried out and the procedure is over; if not exists, then a procedure E is carried out; D. a line is added in the network according to the line-adding mode which has the smallest standard deviation of the Betweeness of the whole network and the sum of Betweenness of the whole network; E. a line is added in the network according to a line-adding mode which has huge practical network capacity. The invention has the advantages of enhancing network capacity, avoiding unnecessary network equipment upgrade and reducing cost of enhancing network capacity.

The invention relates to an atmospheric pressure photoionization mass spectrum device for analyzing solid fuel pyrolysis on line. The device comprises a pyrolyzing furnace, an auxiliary volatile solvent introduction mechanism, an atmospheric pressure photoionization source and a mass spectrometer. With the increasingly exhausted fossil fuel, a process of preparing various hydrocarbon fuels and petrochemical materials through solid fuel pyrolysis is gradually concerned by people. According to the invention, the species distribution and generation mechanism of solid fuel pyrolysis products such as solid wastes (such as polypropylene), biomass, coal and oil shale can be accurately and rapidly analyzed on line in real time, people can be helped to well master the internal rules of pyrolysis, effective resource utilization is comprehensively realized, and the device has great significance on sustainable development of China.

The present invention relates to a mass spectrometry analysis instrument, specifically to a complete organic and inorganic explosive analyser, which comprises a thermal desorption injector, a sampling cloth, a nickel source, a low temperature plasma ionization source and an analyzer, wherein the thermal desorption injector is provided with a carrier gas inlet and a sample gas outlet, the sampling cloth is arranged in the thermal desorption injector, the sample on the sampling cloth is injected after thermal desorption, and the nickel source, the low temperature plasma ionization source and the analyzer are sequentially arranged on the gas path on the rear end of the sample gas outlet of the thermal desorption injector. According to the present invention, with the two ionization modes such as the low temperature plasma ionization source and the nickel source, the organic and inorganic explosives can be completely detected; the ionization efficiency and the detection sensitivity of the explosives capable of ionizing the two ionization sources can be improved; and the doped gas is added to the carrier gas or low temperature plasma gas ionization discharge gas, such that the reaction reagent ions in the ionization source can be changed, and the selectivity and the specificity of the explosive detection can be improved.

The invention provides an underwater towing cable steady-state motion multi-objective optimization method and system, and the method comprises the steps: building a mathematic model of underwater towing cable motion, and calculating a towing cable steady-state motion control equation; selecting parameters for determining the state of the towing cable, selecting a sample point within the value range of the parameters, calculating the towing depth of the tail end and the tension of the head end of the towing cable to obtain the response of the sample point, and establishing a second-order polynomial response surface model of the towing depth of the tail end and the tension of the head end; and taking the maximum tail end dragging depth and the minimum head end tension as optimization objectives, and obtaining a Pareto optimal solution set of parameters by adopting a multi-objective genetic algorithm. Through the scheme, the problem that the influence degree of the parameters on the steady-state motion of the towing cable is difficult to accurately determine is solved, and the influence of each parameter on the towing cable state can be accurately analyzed.

The invention relates to a human brain photostimulation regulation and control device. The device comprises a light parameter regulation and control module, a light generation module, a light irradiation probe and a probe position adjustment module which are connected in sequence, wherein the light parameter regulation and control module is connected with the light generation module and is used for setting the light intensity, wavelength and irradiation time of light signals generated by the light generation module; the light generation module generates light signals with preset light intensity and frequency and transmits the light signals to the light irradiation probe; the irradiation area of the light irradiation probe can be adjusted according to different irradiation modes, and the light irradiation probe is used for implementing fixed-point irradiation on an area corresponding to a specific disease of the brain; and the probe position adjusting module is connected with the lightirradiation probe and used for adjusting and locking the irradiation position of the light irradiation probe. By inputting optical signals to specific parts of the human brain, the device can increaseATP in the human brain, enhance the activity of the human brain and improve the cognitive competence of the human brain, and has a certain adjuvant therapy effect on diseases such as depression, autism, Alzheimer's disease, Parkinson's disease and epilepsy.

The invention provides a concentration method for aroma components of the West Lake Longjing Tea. The method comprises the following steps: weighing the West Lake Longjing Tea, then taking purified water, adding the purified water into a distillation container, heating the purified water to allow the water to be boiling, allowing water vapor to pass through the tea so as to enable aroma components of the tea to be distilled off with the water vapor and enter a condenser for condensation, and collecting distillate; adding mixed liquor of dichloromethane, ether and pentane into the distillate, carrying out continuous extraction, taking an organic phase at an upper layer, removing water in the organic phase and carrying out filtering with a filter membrane; and adding a mixed solution obtained after filtering with the filter membrane into a Vigreux column, placing the Vigreux column in a water-bath pot with a constant temperature of 45 to 55 DEG C, carrying out Vigreux fractionation and concentration, taking out a mixed solution obtained after Vigreux fractionation and concentration and carrying out concentration by using a nitrogen blowing instrument so as to obtain the concentrated aroma components of the West Lake Longjing Tea. The method exerts enrichment and concentration effects on microcomponents, benefits qualitative and quantitative analysis of infinitesimal substances, effectively reduces loss of volatile components at the same time and improves the recovery rate of aroma substances.

The invention discloses a fusion depth and fusion width detection method for a thin-wall material welding face. The fusion depth and fusion width detection method is conducted specifically according to the following steps that 1, to-be-detected thin-wall material is cut, the cut face is cleaned after cutting, and thin-wall material fragments are obtained; 2, the thin-wall material fragments are inlaid, and an inlaid sample piece is obtained; 3, the inlaid sample piece is polished and ground, and an accurately ground sample piece is obtained; 4, etchant solution is prepared, metallographic etching is conducted on the accurately ground sample piece, and an etched sample piece is obtained; and 5, the etched sample piece is detected by a fusion depth detector, and fusion width and fusion depthdata of the etched sample piece are obtained. The fusion depth and fusion width detection method is simple and efficient to operate, accurate, reliable and suitable for detection of automatic mass production. Weld joint quality can be reflected visually, accurately and reliably, and through weld joint fusion depth detection and quantitative analysis, welding energy, focal length, rotation speed,bursting tests and other abnormal causes appearing in the welding process can be analyzed conveniently, quantitatively and qualitatively.

The invention discloses an identification method for the effective components in a ginkgo leaf preparation. The identification method comprises: (1) preparing a testing product: taking a proper amount of a ginkgo leaf preparation to be detected, adding n-butanol, extracting, filtering, evaporating the filtrate, and adding ethanol to the residue to dissolve so as to be adopted as the testing product solution; (2) preparing a reference substance solution: taking a proper amount of a ginkgo leaf reference preparation, and preparing the reference substance solution according to the step (1); and (3) carrying out thin layer chromatography: respectively sucking 1-10 [mu]lt of the testing product solution and the reference substance solution, respectively spotting on the same silica gel G plate, developing with an ethyl acetate, isopropyl alcohol, methanol and water mixture, taking out the thin plate, carrying out air drying, spraying a 1-5% aluminum chloride ethanol solution, placing in a 365 nm ultraviolet light lamp, viewing the fluorescence, and observing the spot. According to the present invention, with the identification method, the good separation effects of various effective components are good, the spots are clear, the Rf value is moderate, various effective components can be accurately identified, and the qualitative analysis and quality control are easily achieved.

The invention discloses a dynamics modeling method of a four-axis mechanical arm. The dynamics modeling method includes: firstly, establishing a natural coordinate system according to the structure ofthe four-axis mechanical arm; defining vector parameters of each axis of the mechanical arm in a natural coordinate system; converting the data into a coordinate form; substituting the coordinate ofeach vector parameter into a Kaien equation to respectively obtain an inertia term equation, a centrifugal term equation and a gravity term equation of each axis, and simplifying the equations; addingthe simplified equations of each axis to obtain a dynamics simplified equation of each axis; establishing the four-axis mechanical arm model according to the kinetic equation of the first axis, the kinetic equation of the second axis and the kinetic equation of the third axis. According to the modeling algorithm adopted by the invention, the particularity of the structure and the working form andposition of the mechanical arm is utilized, so that a large amount of repetitive calculation contents in a traditional method are omitted, the calculation speed is greatly increased, and conditions are provided for high-frequency and accurate dynamic control.

The invention discloses preparation of a three-dimensional SiO2-Ag porous structure and application of the three-dimensional SiO2-Ag porous structure in detection of volatile organic compounds. The preparation method comprises the following steps: firstly, preparing a SiO2 gas adsorption carrier with high specific surface area and high porosity through an acid-base two-step catalysis method, and then doping silver nanoparticles with a certain size into silicon dioxide to prepare the three-dimensional SiO2-Ag porous structure material. The structure has a large surface area; the porosity is high; high-concentration silicon hydroxyl (Si-OH) on the surface is realized; under the dual effects of physical adsorption and chemical bonding, the substrate has good gas adsorption and capture effects, can be used as a substrate material for enhancing Raman spectra for detection of volatile organic compounds, has excellent signal reproducibility and good stability, and has great application potential in field detection.

The invention provides a Blue Dream white liquor aroma component concentrating method. Blue Dream white liquor is measured and is added into a container, then a saturated salt solution is added, mixing is performed to obtain a solution to be extracted, wherein the volume ratio of the Blue Dream white liquor to the salt solution is 1:3-7; a mixed solution of dichloromethane, diethyl ether and hexane is added into the solution to be extracted, continuous extraction is performed to obtain an upper-layer organic phase, moisture in the organic phase is removed, and then filtration is performed by adopting a filter membrane; the mixed solution obtained after filtration by adopting the filter membrane is added into an impalement type fractionation device, the fractionation device is put into a constant-temperature water bath kettle of 45-55 DEG C to perform impalement type fractionation and concentration, and the mixed solution subjected to impalement type fractionation and concentration is concentrated by using a pressure blowing concentrator to obtain a Blue Dream white liquor aroma component. The Blue Dream white liquor aroma component concentrating method is simple and convenient to operate, capable of saving time and effort and low in cost, can play enrichment and concentration roles on minor components, facilitates qualitative and quantitative analysis on extremely trace amounts of substance, meanwhile effectively reduces loss of volatile components and improves the recovery rate of aroma substance.

The invention discloses a concentration method for aroma components of a grape-flavor cocktail. The concentration method comprises the following steps: weighing a lime-flavor cocktail, adding the lime-flavor cocktail in a container, adding sodium chloride until the obtained solution to be in a saturated saline solution state so as to obtain to-be-extracted liquid, adding a mixed liquid of dichloromethane, ether and hexane, carrying out continuous extraction, taking an organic phase at an upper layer, removing water in the organic phase and carrying out filtering with a filter membrane; and adding a mixed solution obtained after filtering with the filter membrane into a Vigreux column, placing the Vigreux column in a water-bath pot with a constant temperature of 45 to 55 DEG C, carrying out Vigreux fractionation and concentration, taking out a mixed solution obtained after Vigreux fractionation and concentration and carrying out concentration by using a nitrogen blowing instrument so as to obtain the concentrated aroma components of the grape-flavor cocktail. The method is simple and convenient to operate, labor-saving and time-saving, has low cost, exerts enrichment and concentration effects on microcomponents, benefits qualitative and quantitative analysis of infinitesimal substances, effectively reduces loss of volatile components at the same time and improves the recovery rate of aroma substances.

The invention discloses a current evaluation method based on the combined current moment for distribution network closing and switching to supply current. The value circuit calculates the total impedance converted to the 10kV side of the loop closing path, and calculates the equivalent resistance distance from each node load to the voltage reference point in the two divided systems; collects the actual current of each node before closing the loop, and calculates two The load current moment of each node in the system; calculate the combined current moment of the two systems; combine the total impedance of the loop closing path of the grid, the voltage reference value and the combined current moment of the two systems to calculate the closing loop transfer current; judge the closing loop transfer power supply If it is not satisfied, it is necessary to change the operation structure of the power grid and adjust the loop-closing transfer current until the loop-closing transfer current meets the loop-closing conditions. The beneficial effect of the present invention is that it can simplify the method for evaluating the loop-closing transfer current, reduce the calculation amount and improve the efficiency.

The present invention relates to a mass spectrometry instrument, specifically a comprehensive analyzer for organic and inorganic explosives, comprising a thermal analysis sample injector, a sampling cloth, a nickel source, a low-temperature plasma ionization source and an analyzer. There is a carrier gas inlet and a sample gas outlet on the top; the sampling is arranged in the thermal analysis sampler, and the sample on the sampling cloth is injected after thermal analysis; Nickel source, low temperature plasma ionization source and analyzer. The comprehensive analyzer for explosives of the present invention can fully detect organic and inorganic explosives through two ionization modes of low-temperature plasma ionization source and nickel source; for explosives that can be ionized by both ionization sources, the ionization efficiency and Detection sensitivity; adding dopant gas to the carrier gas or the discharge gas of the low-temperature plasma ionization source can change the reactive reagent ions in the ionization source and improve the selectivity and specificity of explosive detection.

The invention relates to a human brain light stimulation control device, comprising: a light parameter control module, a light generation module, a light irradiation probe and a probe position adjustment module connected in sequence; the light parameter control module is connected with the light generation module and is used for setting the light The light generating module generates the light intensity, wavelength and irradiation time of the light signal; the light generating module generates the light signal with a predetermined light intensity and frequency, and transmits the light signal to the light irradiation probe; the irradiation area of ​​the light irradiation probe can be adjusted according to different irradiation modes , which is used to perform fixed-point irradiation on the area corresponding to a specific disease of the brain; the probe position adjustment module is connected with the light irradiation probe to adjust and lock the irradiation position of the light irradiation probe. The present invention increases the ATP in the human brain, enhances the activity of the human brain, and improves the cognitive ability of the human brain by inputting light signals to a specific part of the human brain, and is effective for depression, autism, Alzheimer's disease, Parkinson's disease and other diseases. Epilepsy and other diseases have a certain role in adjuvant therapy.

The invention provides a method for quickly detecting the adsorption performance of an adsorbent, which uses an ultra-high performance liquid chromatography system to detect related substances, adopts an ACQUITY UPLC BEH130C18 chromatographic column, an ultraviolet detector, uses acetonitrile or methanol as the mobile phase A, and uses water For mobile phase B, gradient elution. The invention achieves baseline separation within five minutes and has a good peak shape, which is convenient for further quantitative and qualitative analysis, greatly shortens the detection time, improves the detection efficiency, and can perform quantitative and qualitative analysis on the three items of creatinine at one time, and can be detected at one time The adsorption rate and adsorption capacity of the adsorbent to the three items of creatinine can reflect the adsorption performance of the adsorbent quickly, efficiently and accurately. At the same time, the present invention realizes the adsorption experiment under the condition that the three substances of creatinine exist at the same time, and the results can be More realistically reflect the adsorption performance of the adsorbent on various substances in the blood.

The invention relates to a DBD mass-spectrum ionization source device added with a selective detection reagent. The ionization source device comprises a T-shaped glass tube, a central ground electrode, a radiofrequency high-voltage electrode and a front ground electrode, wherein the rear port of the T-shaped glass tube is used as a discharge gas inlet, the middle port of the T-shaped glass tube is used as a selective detection reagent inlet, and the front port of the T-shaped glass tube is used as an outlet for plasma formed by discharge. During work of the ionization device, two discharge areas are respectively formed between the radiofrequency high-voltage electrode and the central ground electrode as well as between the radiofrequency high-voltage electrode and the front ground electrode, so that more heat can be generated and used for thermal analysis on samples, and the ionization efficiency is improved. When the selective detection reagent gas is input through the middle port of the T-shaped glass tube, the reagent gas can selectively react with a certain substance to form new ions so that the certain substance is distinguished from other substances, thereby improving the detection selectivity, being helpful for qualitative analysis on the samples, avoiding the central ground electrode from corrosion, and prolonging the service life of the electrodes.

The invention provides a Maotai liquor aroma component concentrating method. Firstly, Maotai liquor is measured and is diluted by using a saturated sodium chloride water solution till the ethyl alcohol content is 10%, the diluted Maotai liquor is added into a reaction container, then a mixed solution of dichloromethane, diethyl ether and petroleum ether is added, continuous extraction is performed to obtain an upper-layer organic phase, moisture in the organic phase is removed, and filtration is performed by adopting a filter membrane; the mixed solution obtained after filtration by adopting the filter membrane in the step 1 is added into an thorn type fractionation device, the fractionation device is put into a constant-temperature water bath kettle of 50-60 DEG C to perform thorn type fractionation and concentration, and the mixed solution subjected to thorn type fractionation and concentration is concentrated by using a pressure blowing concentrator to obtain a concentrated Maotai liquor aroma component. The Maotai liquor aroma component concentrating method is simple and convenient to implement, capable of saving time and effort and low in cost, can play enrichment and concentration roles on minor components, facilitates qualitative and quantitative analysis on extremely trace amounts of substance, meanwhile effectively reduces loss of volatile components and improves the recovery rate of aroma substance.

The invention relates to a probe for efficiently detecting mercury ions and a preparation method and application thereof. Specifically, the probe provided by the invention is a fluorescent probe basedon coumarin compounds as fluorophores and mercaptan as a recognition receptor, can realize high-selectivity and ultra-sensitive analysis of mercury ions, and can determine the concentration of mercury ions in a sample. The probe can realize at least one of the following technical effects: high selectivity, strong anti-interference capability, quick response, convenient qualitative analysis, strong anti-interference capability, high sensitivity and wide detection range.

The invention relates to a method for determining components of medium and low-temperature coal tar on the basis of a mixed internal standard method. The method comprises the steps as follows: 1) selection of internal standard substances: selecting multiple internal standard substances according to components of to-be-detected medium and low-temperature coal tar; 2) preparation of a standard liquid: preparing the internal standard substances selected in the step 1) into standard liquids, and mixing the liquids together to form a mixed standard liquid; 3) preparation of a to-be-determined sample liquid: preparing a sample liquid from a to-be-detected sample and adding the sample liquid to the mixed standard liquid; 4) analyzing and detecting a sample through gas chromatography-mass spectrometry; 5) data analysis and sample identification: performing calculation according to original chromatographic data and mass spectrometric data obtained through detection to obtain the content of eachcomponent in the medium and low-temperature coal tar. The method solves the technical problem about weak analysis capacity for the medium and low-temperature coal tar, and the method can determine the relative content of each component in coal tar quickly and simply in a classified manner.

The invention discloses a method of enhancing network capacity, comprising five procedures: A. a line between two nodes which have no connections is added, the sum of Betweenness of the whole network and standard deviation of Betweenness of the whole network are counted; B. the procedure A is repeatedly carried out, with every mode of adding a line between two nodes which have no connections, thesum of Betweenness of the whole network and standard deviation of Betweenness of the whole network are respectively counted; C. whether a line-adding mode exists is judged, if exists, then a procedure D is carried out and the procedure is over; if not exists, then a procedure E is carried out; D. a line is added in the network according to the line-adding mode which has the smallest standard deviation of the Betweeness of the whole network and the sum of Betweenness of the whole network; E. a line is added in the network according to a line-adding mode which has huge practical network capacity. The invention has the advantages of enhancing network capacity, avoiding unnecessary network equipment upgrade and reducing cost of enhancing network capacity.

A method of using a flat-panel inkjet printer to coat antigens / antibodies on a microporous plate, placing a clean microporous plate on the workbench of a flat-panel inkjet printer, adding reagents to a clean printer cartridge; obtaining pictures of the microporous plate, and In the computer software, the positions of the pictures corresponding to the microwells where the same reagent is added are set to the same color, and the reagents corresponding to the colors of the pictures are the same as the corresponding reagents in the corresponding ink cartridges; multiple reagents that need to be added in sequence are made into multiple files , print the pictures one by one in the corresponding order. In the present invention, the antigen / antibody is coated on the microporous plate by means of printer inkjet, so that the antigen / antibody can be stably and uniformly solidified, the operation is semi-automatic, and the dosage is accurate and uniform. By changing the picture information to change the coated quantity of the microplate and the concentration of antibody / antigen, it is convenient to set the concentration gradient of coated antigen / antibody to form a control group in ELISA, which is convenient for qualitative analysis and quantitative detection.

The invention discloses a method for simultaneously detecting ketose and amino sugar by a gas chromatography-mass spectrometry analysis method. According to the method, thiolation and silicon etherification derivation of samples, ketose and amino sugar in mixed monosaccharide standard solution are performed by the aid of ethanethiol-trifluoroacetic acid and hexamethyldisilazane-trimethylsilane systems, reaction products are extracted by the aid of methylene dichloride or trichloromethane, organic layers are detected by the aid of a GC-MS (gas chromatography-mass spectrometer), the ratio of peak areas of the mixed monosaccharide standard solution with different concentrations to internal standard peak areas serves as a vertical coordinate, the concentration of each monosaccharide serves asa horizontal coordinate, so that a standard curve is built, and the content of monosaccharide in sample solution is quantified by an internal standard method. The method has the advantages of high specificity, good repeatability and separation degree, reliable result and the like, and ketose and amino sugar in traditional Chinese medicines can be detected and quantified. Besides, the method can also detect glucuronic acid, galacturonic acid, glucose, galactose, mannose, rhamnose, fucose, arabinose and xylose.

The invention discloses a method for rapidly detecting a compound with an instable structure and belongs to the technical field of analysis chemistry, solving the problem that the existing method can not accurately and rapidly detect the compound with the instable structure. The method comprises the following steps of: accurately weighing 10 mu L of compound with the instable structure on a screen, naturally drying the compound in the air; and placing the compound between a real-time direct analysis mass spectrometer ion source gas outlet and a linear ion trap mass spectrometer ion inlet, wherein when the ion source is in a positive or negative ion mode, the spray point voltage is 3kV, the grid voltage is 250 to 500V, the working gas is high-purity argon, the temperature is 200 to 500 DEG C and the pressure is 0.3 to 0.8MPa, and when the mass spectrometer is in a positive or negative ion mode, the capillary voltage is respectively 10 to 50V and 10 to 50V below zero, the lens voltage is respectively 50 to 150V and 50 to 150V below zero, the capillary temperature is 250 to 300 DEGC, and the mass-to-charge ratio in a scanning range is 60 to 700Da. The method is accurate, quick and high in sensitivity.

The invention relates to a method for qualitatively measuring nonionic surfactants of a compounded system. According to the method, a C18 adsorbent and 11 eluents with gradually enhanced elution capabilities are adopted, researches on 11 eluates of 5 nonionic surfactants with similar structures, polarities and molecular weights are made by virtue of simple methods of pH test paper, visual measurement, infrared spectrums and the like, pH values, elution amounts and principal component parameters of the 11 eluates of each surfactant form a group of data with strong characteristics, and the nonionic surfactants in the compounded system can be qualitatively analyzed conveniently according to the data of the surfactants. The qualitative method is convenient, no time is required to be consumed in exploring and selecting various chromatographic separation conditions, and the qualitative analysis efficiency is greatly improved; such a concept can not only be used for qualitative analysis overthe compounded system with the 5 surfactants but also be suitable for qualitative analysis over nonionic surfactants in other compounded systems.

The invention relates to a high-efficiency mercury ion detection probe, a preparation method and an application. Specifically, the probe of the present invention is a class of fluorescent probes based on coumarin compounds as fluorophores and thiols as recognition receptors, which can achieve high selectivity to mercury ions, ultrasensitive analysis, and determination of mercury in samples. The concentration of ions; this type of probe can achieve at least one of the following technical effects: high selectivity, strong anti-interference ability, fast response, convenient qualitative analysis, strong anti-interference ability, high sensitivity, and wide detection range.

The invention discloses an identification method for the effective components in a ginkgo leaf preparation. The identification method comprises: (1) preparing a testing product: taking a proper amount of a ginkgo leaf preparation to be detected, adding n-butanol, extracting, filtering, evaporating the filtrate, and adding ethanol to the residue to dissolve so as to be adopted as the testing product solution; (2) preparing a reference substance solution: taking a proper amount of a ginkgo leaf reference preparation, and preparing the reference substance solution according to the step (1); and (3) carrying out thin layer chromatography: respectively sucking 1-10 [mu]lt of the testing product solution and the reference substance solution, respectively spotting on the same silica gel G plate, developing with an ethyl acetate, isopropyl alcohol, methanol and water mixture, taking out the thin plate, carrying out air drying, spraying a 1-5% aluminum chloride ethanol solution, placing in a 365 nm ultraviolet light lamp, viewing the fluorescence, and observing the spot. According to the present invention, with the identification method, the good separation effects of various effective components are good, the spots are clear, the Rf value is moderate, various effective components can be accurately identified, and the qualitative analysis and quality control are easily achieved.