48 results about "Standard addition" patented technology

The invention discloses a method for determining the content of hydrogen ions in a chloroplatinic acid solution, and belongs to the technical field of analytical testing. In order to solve the problems that the chloroplatinic acid solution is yellow after being diluted and the manual titration end point is difficult to judge, a potentiometric titration method is adopted, and the end point is determined by measuring electrode potential mutation without depending on indicator color change. The method comprises the steps of test condition preparation, burette calibration, standard solution preparation and calibration, sample treatment and titration, result calculation and the like, a full-automatic potentiometric titrator is selected, the titration volume is controlled within the range of 10-15 mL, and a sodium hydroxide standard solution is used for sample titration after calibration. The relative standard deviation of the determination result is less than 0.5%, the adding standard recovery rate is between 96.3% and 103.1%, and the method has the characteristics of high analysis speed, high accuracy and good stability, is suitable for accurate detection of hydrogen ions in chloroplatinic acid production and quality inspection, and effectively solves the defects of the traditional method.

The invention belongs to the field of analytical chemistry, relates to material preparation, and particularly discloses a preparation method of a copper-doped covalent organic framework and application of the copper-doped covalent organic framework in adrenaline colorimetric detection. Firstly, 1H-indazole-4, 7-diamine (Iz) and 1, 3, 5-triformyl phloroglucinol (Tp) are used as monomers to synthesize a novel covalent organic framework (Iz-Tp COF) through a Schiff base reaction, copper ions are introduced into the Iz-Tp COF framework to prepare a novel metal covalent organic framework (Iz-Tp (at) Cu), and then according to the phenomenon that the Iz-Tp (at) Cu can catalyze oxidation color development of epinephrine, the metal covalent organic framework (Iz-Tp (at) Cu can catalyze oxidation color development of epinephrine. According to the present invention, the simple, sensitive and efficient adrenaline colorimetric detection method is established, the test conditions are finally optimized, the standard addition method is combined to accurately determine the adrenaline concentration in the urine, and the good practical application value is provided.

The invention discloses a system for detecting and analyzing water-soluble heavy metals in an ecological system based on machine learning. The system is used for detecting water-soluble harmful heavy metal elements in atmospheric particulates. The system comprises a sampling preprocessing module, an electrochemical detection module, a machine learning analysis module and a data verification output module which are connected in sequence, the sampling pretreatment module is used for collecting PM2.5 and PM10 particles by adopting a quartz fiber filter membrane and carrying out dissolving and filtering pretreatment; the electrochemical detection module is used for heavy metal enrichment and detection; the machine learning analysis module adopts an improved CNN (Convolutional Neural Network) to automatically identify the volt-ampere spectrogram, and establishes a nonlinear mapping model of the relationship between the metal ion concentration and the peak current; and the data verification output module performs quantitative analysis by adopting a standard addition method, and compares and identifies the pollution source through a multi-element fingerprint feature database. According to the invention, eight heavy metal elements such as Cd, V, Cr, Ni, Se, As, Mn and Pb can be detected at the same time, the detection range is 0.1-1000 [mu] g / L, and intelligence and automation of heavy metal detection are realized.

The invention discloses a quality mining and evaluation method of a wolfberry characteristic flavor nourishment, and relates to the technical field of food quality analysis and sensory evaluation, and the method comprises the following steps: S1, carrying out non-targeted analysis on the wolfberry characteristic flavor nourishment by adopting headspace solid phase microextraction in combination with comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry, and obtaining original abundance data of the volatile compound. According to the quality mining and evaluation method for the Chinese wolfberry characteristic flavor nourishment, accurate identification and quantitative evaluation of key flavor substances in the Chinese wolfberry characteristic flavor nourishment are realized by establishing a flavor contribution potential index model and combining a dual verification mechanism. According to the method, the limitation that only a single chemical component is concerned or actual sensory experience is ignored is solved, and the accuracy and reliability of flavor component screening are improved by integrating multi-dimensional parameters such as instrument response intensity, human olfaction threshold and matrix release characteristics and through cross validation of a gas chromatography-olfaction technology and a standard substance addition experiment.

The application provides a method for determining the content of Zr metal ions in a high-purity volatile organic matrix environment by ICP-MS, comprising the following steps: (1) based on the volatile nature of the organic matrix, replacing the sampling system and debugging the instrument parameters; (2) acidifying the volatile organic matrix to be tested; (3) testing on the machine; (4) according to the generated standard curve, reading out the content of the metal ion Zr in the high-purity reagent IPA. The method directly and effectively improves the problem that the direct sampling ICP-MS cannot pull out the Zr element standard curve and thus cannot read out the content of Zr in IPA; meanwhile, the pretreatment method of the method is an acidification method, which is simple to operate and low in time cost; and the standard addition method can eliminate the matrix interference, realize the detection of the metal ion Zr under the high-purity matrix, and meet the production demand.

The application discloses a raw material medicine trace heavy metal ion detection method and system based on a micro-fluidic chip, relates to the technical field of micro-fluidic detection and electrochemical analysis, and comprises the following steps: weighing, constant volume, clarification of the raw material medicine sample, solidifying target ions, standard calibration and peak interval / scanning parameters into a detection parameter table; according to the detection parameter table, the flow and valve control are controlled to complete liquid preparation, muSPE enrichment, washing, elution and constant volume loading on the chip; blank, no standard addition, one-time standard addition and numbered archiving are sequentially measured; baseline is made according to the solidified parameters, integration and blank deduction are carried out, the solution concentration is calculated combined with standard addition measurement, and the content is output. The method disclosed by the application can constrain micro-fluidic liquid preparation, enrichment, elution and constant volume loading, so that blank, no standard addition and standard addition three rounds are measured under the same source condition; the curve and standard addition measurement are numbered and archived, integral, blank deduction and concentration are solved simultaneously, and the quantitative consistency, traceability and calculation reliability are improved.

The invention discloses a high-performance biosensor based on a g-C3N4 / TiO2 heterojunction as well as a preparation method and application of the high-performance biosensor, and belongs to the technical field of biosensing and food safety detection. The sensor is constructed by taking a glassy carbon electrode as a substrate and sequentially modifying a g-C3N4 / TiO2 heterojunction composite material and diamine oxidase (DAO). The g-C3N4 / TiO2 heterojunction is prepared through a one-step calcination method, a type II p-n junction structure is formed, photo-generated charge separation and interface electron transfer are effectively promoted, and the conductivity, catalytic activity and enzyme immobilization capacity of the electrode are remarkably improved. The invention discloses a synergistic mechanism of heterojunction interface enhanced histamine selective adsorption and catalytic reaction through density functional theory calculation. The sensor shows excellent detection performance on histamine: the linearity is good in a range of 0.05-10 mM, and the detection limit is as low as 0.075 M; the selectivity is still higher than 93% in the presence of an interferent with ten times of concentration; when the method is applied to detection of actual samples of beef, mutton, fish and chicken, the adding standard recovery rate is 93.60%-101.8%, and the relative standard deviation is smaller than 5%. The sensor has the advantages of high sensitivity, good selectivity, strong anti-interference capability, good reproducibility and the like, and a reliable new method is provided for rapid and accurate screening of histamine in food.

The invention belongs to the technical field of catalyst metal content detection, and discloses a method for analyzing and determining cesium / rhenium content in a catalyst containing alpha-alumina. The method is simple and convenient to operate, rapid in analysis and high in accuracy. In view of no publicly reported analysis method for the content of cesium and rhenium in the alpha-alumina-containing catalyst, the method can fill the blank in the field, can dissolve a sample to a greater extent, convert cesium and rhenium into a soluble ion state and select the optimal test condition of an instrument, and can simultaneously determine cesium and rhenium, thereby saving resources, reducing the cost and improving the analysis efficiency. The relative standard deviation (RSD, n = 8) of the content determination result of cesium and rhenium is less than 2%, the adding standard recovery rate is 97.4-103.7%, the interference of matrix aluminum in the catalyst is shielded, and the accuracy of the analysis method is high.

The present invention provides a method for a quantitative analysis of elements in a sample gas, such as an LA-ICP-MS, without use of a solid reference sample. The present invention includes, in a method for a quantitative analysis of elements in a solid sample with an inductively coupled plasma mass spectrometer to which a sample gas generated from the solid sample is introduced, measuring concentrations of elements contained in the sample gas by use of signal intensities obtained by introducing a standard solution containing specific elements in known concentrations from a solution introduction unit to a torch part in such a manner as to directly supply (standard addition) the standard solution at a flow rate of 3 μL / min or less.

This invention discloses a nanozyme for the detection of phenolic compounds and a quantitative detection method for phenolic compounds. The nanozyme comprises an organometallic framework material and copper loaded on the surface of the organometallic framework material, possessing a core-shell structure. The active metal catalytic center is loaded on the material surface, which helps to improve the utilization efficiency and catalytic activity of the active center, thereby enhancing the detection capability of large molecular weight phenolic compounds. Based on the standard addition method, the nanozyme of this invention can be used for the quantitative analysis of BPA in environmental water and thermal paper, exhibiting high accuracy and sensitivity, and strong anti-interference ability. The quantitative detection method of this invention can be used in conjunction with an image acquisition device for quantitative calculation of phenolic compounds, further simplifying the detection of phenolic compounds.

The invention discloses a detection method of a rubber scorch retarder and a conversion product thereof, and belongs to the technical field of chemical detection. According to the technical scheme, the method comprises the following steps: extracting a rubber sample to be detected by using an extracting solution, and then carrying out quantitative analysis on N-cyclohexyl-thiophthalimide and phthalimide by using a liquid chromatograph, a liquid chromatograph adopts a gradient elution mode, a mobile phase in 0-2 min is acetonitrile: water = (30-50): (50-70), a mobile phase in 2-5 min is subjected to gradient from the acetonitrile: water = (30-50): (50-70) to the acetonitrile: water = (80-99): (1-20), and the acetonitrile: water = (80-99): (1-20) is kept in 5-8 min; the ratio of acetonitrile to water is (80-99): (1-20), and the ratio of acetonitrile to water is (30-50): (50-70) in 8-11 min, and the ratio of acetonitrile to water is kept (30-50): (50-70) in 11-13 min. The method has the advantages of simple pretreatment steps, short analysis period and high sensitivity, is suitable for quality control and product inspection in the production process, and can provide a reliable detection means for formula optimization and performance evaluation of rubber products; by adopting the detection method disclosed by the invention, the linear range of CTP and PHT is 0.1-100 mg / L, the detection limit of the method is 0.02-0.04 mg / L, the adding standard recovery rate is 98-103%, the analysis result is accurate, and the sensitivity is high.

The application discloses a method for determining the content of NBPT in urea, comprising the following steps: S1, preparation of a detection reagent; S2, sample pretreatment; S3, chromatography-mass spectrometry combined detection; and S4, quantitative analysis. The method directly injects a 0.1% formic acid aqueous solution-acetonitrile mobile phase system into an LC-MS / MS system, wherein the formic acid serves as an ionization promoter to significantly improve the protonation efficiency of NBPT under ESI + source, the response intensity of [M+H] + is greater than 10 5 cps, and the derivatization step necessary for a traditional HPLC-UV method is completely eliminated; secondly, a blank matrix extraction liquid is introduced to match a standard curve, and a standard sample is diluted by a urea / fertilizer matrix extraction liquid homologous to the sample to be measured, so that the ion suppression effect of humic acid on the target object is accurately offset, the standard addition recovery rate of a complex matrix sample is stably kept at 85%-99.5%, and the quantitative deviation is less than 5%.

The invention relates to an electrochemiluminescence sensor based on an intelligent controlled release-interface capture-self-enhancement mechanism and application of the electrochemiluminescence sensor in procalcitonin detection, and belongs to the technical field of electrochemiluminescence detection. Controllable release of signal molecules is achieved by packaging terpyridyl ruthenium through ZIF-8, meanwhile, a DNA layer rich in guanine is modified on an electrode interface, and the layer can serve as a nano trap to efficiently capture the signal molecules and can also serve as a co-reactant to achieve signal amplification. A DNA strand displacement reaction is utilized to regulate and control a target response release process, and detection is realized according to a quantitative relationship between the concentration of procalcitonin and an electrochemical luminescence signal. A labeling recovery method verifies that the recovery rate of the sensor in a human serum sample reaches 100.6-103.6%, good accuracy and precision are shown, and a reliable platform is provided for clinical detection of inflammatory markers.

The invention discloses a zinc-cadmium-lead-copper multi-element synchronous in-situ detection method based on square-wave anodic stripping voltammetry, which comprises the following steps: collecting a sample to be detected, filtering, adopting a microelectrode array as a working electrode, carrying out coating modification on the surface of the electrode, and covering a gel protection layer; a measurement system composed of the pretreated electrodes is placed in a sample to be measured, IT is operated to conduct electrode self-cleaning after standing, then IT is operated to achieve synchronous enrichment of multiple elements, the balance process is completed again through IT, SWASV is adopted to conduct enrichment dissolution scanning, and enriched scanning current is obtained; electrode self-cleaning is carried out, a balance process is completed through IT, and background dissolution scanning is carried out by adopting SWASV to obtain background scanning current; subtracting the enriched scanning current from the background scanning current to obtain a net volt-ampere current curve and a peak current value from which matrix interference is deducted; and establishing a linear relationship between a peak current value and the concentration by adopting a standard addition method, and realizing synchronous quantitative analysis of multiple elements through the linear relationship.

The invention discloses a method for measuring gallium, germanium, silver, indium, tellurium and thallium in nickel, and particularly relates to the technical field of metal trace element measurement. The method comprises the following steps: preparing a sample, preparing a sample blank solution and a sample solution, preparing a standard solution, preparing a working curve solution, drawing a working curve by adopting an inductively coupled plasma mass spectrometer, measuring the sample, processing experimental data and the like. After the interference of the nickel matrix is eliminated, the contents of gallium, germanium, silver, indium, tellurium and thallium are directly determined by the inductively coupled plasma mass spectrometry, so that the analysis speed is high, the detection limit is low, the detection result is accurate and reliable, the relative standard deviation is low, the standard addition recovery rate of a sample is high, and the contents of gallium, germanium, silver, indium, tellurium and thallium in the sample can be rapidly and accurately determined.

A direct quantitative analysis method for fractional derivative spectra of multi-component systems; following the standard addition method, adding [a specific ingredient] to the multi-component system h to be analyzed. n The analyte f at several gradient concentrations was mixed thoroughly, and the spectra of each sample were acquired using a spectrometer to obtain... F 1- F n; Call the SH algorithm: function S=SHfd(Mraw, v , b , p ),set up b , p , v =v0+kΔ, find the value of v0+kΔ. F 1- F continuous derivatives of n DF 1- DF n; Determine the calibration peak position λ and the derivative order vJ: In DF 1- DF In n, the order vJ is found when the correlation between the derivative value at a certain peak position and the amount added is greater than 0.99. The data point corresponding to this peak position is the calibration peak position λ. Under the determined vJ and calibration peak position λ, the content of the analyte f in the multi-component system H can be calculated by plotting the relationship between the amount added C and the derivative value DF = aC + b.

The application provides a kind of determination method of small broken material surface metal impurity of polysilicon, and the method comprises the following steps: taking small broken material sample of polysilicon in a beaker, adding leaching solution, and digesting; taking the digested sample, cooling to room temperature, and transferring into a volumetric flask, then adding HNO3 for constant volume; shaking the volumetric flask, mixing the solid phase and liquid phase uniformly, and then centrifuging; after centrifugation, taking the supernatant to make a standard curve by standard addition method, the first addition amount of the standard curve should be close to the element content in the sample, and a blank is also prepared; the ICP-MS instrument is tuned to be optimal, the standard addition concentration is taken as the abscissa, the measured ion count CPS value is taken as the ordinate, the standard curve is drawn, and the sample is measured. The application avoids secondary pollution, and does not change the volume of acid leaching solution, and also does not have the problem of incomplete flushing of element impurities.

The present application belongs to the technical field of biochemical detection, and discloses a rapid detection method for sodium diacetate in duck blood, which solves the technical problem that the existing detection method cannot accurately detect low content of sodium diacetate in duck blood. The steps are as follows: (1) adding phosphoric acid to sodium diacetate standard solutions with different concentrations to obtain a to-be-detected standard solution; detecting the peak area of the to-be-detected standard solution by gas chromatography, and preparing a standard curve of the concentration of the sodium diacetate standard solution and the peak area; (2) pretreating duck blood samples to obtain a to-be-detected solution; (3) detecting the to-be-detected solution by gas chromatography, and bringing the obtained peak area into the standard curve of step (1) to obtain the concentration of sodium diacetate in the to-be-detected solution. The rapid detection method has a detection limit of 0.007 g / kg, a sample standard addition recovery rate of 92.5-102.4%, good repeatability, a coefficient of variation of less than 10%, and high detection accuracy.

The invention belongs to the technical field of boron detection, and particularly relates to a method for detecting the content of boron in iron ore and application. The method comprises the following steps: adding a mixed acid of nitric acid, hydrochloric acid and hydrofluoric acid into a to-be-detected iron ore sample, and completely decomposing the to-be-detected iron ore sample through microwave digestion to obtain a sample solution; adding calcium salt into the sample solution, adjusting the pH value, enabling fluorine ions in the sample solution to form calcium fluoride precipitates, enabling iron and niobium interference elements in the sample solution to form hydroxide precipitates, and filtering out the calcium fluoride precipitates and the hydroxide precipitates to obtain a filtrate without matrix interference; a standard addition method is adopted, a series of boron standard solutions are added into the filtrate, the spectral line intensity of the series of solutions at the position of 249.678 nm is measured, a working curve is established, and the boron content in the iron ore sample to be measured is calculated through an extrapolation method. The three major pain points of iron and niobium interference, fluorine corrosion and lengthy process are solved in series.

The invention discloses a method for detecting the content of trace metal elements in electronic-grade potassium hydroxide, and belongs to the technical field of electronic chemical detection. The detection method comprises the following steps: diluting an electronic-grade potassium hydroxide sample, and detecting the contents of 27 trace metal elements in the electronic-grade potassium hydroxide by adopting a standard addition method and combining an octupole collision / reaction tank technology with an inductively coupled plasma mass spectrometer. The method has the advantages of simplicity and convenience in operation, high sensitivity, high accuracy, wide linear range, strong anti-interference capability and the like, can effectively detect the content of trace metal ions in the electronic-grade potassium hydroxide, and provides powerful technical support for quality control of the electronic-grade potassium hydroxide.

According to the preparation method, folic acid (FA) is taken as a stabilizer, silver nitrate (AgNO3) is taken as a raw material, sodium borohydride (NaBH4) is taken as a reducing agent, and the silver nano-cluster (AgNCs) with excellent fluorescence performance is synthesized by optimizing reaction conditions. The synthesized AgNCs shows the optimal excitation wavelength at the position of 409.0 nm, and the optimal emission wavelength is located at the position of 500.1 nm. Researches find that after interaction of sunset yellow (SY) and AgNCs, the fluorescence intensity of a system is significantly changed, and two obvious emission peaks appear when the concentration is relatively high. On the basis, a high-selectivity SY detection method is established. Experimental results show that the ratio of the fluorescence intensity of the AgNCs system under the wavelengths of 500.1 nm and 531.9 nm and the concentration (5.0-90.0 [mu] mol / L) of sunset yellow have a good linear relationship, and the lowest detection limit is 3.85 [mu] mol / L. An actual sample is analyzed through an adding standard recovery experiment, the reliability of the method is verified, the recovery rate range is 94.55%-99.83%, and it is indicated that the method is suitable for quantitative detection of sunset yellow in the actual sample.

The application belongs to the technical field of analysis and detection, and particularly relates to a liquid chromatography mass spectrometry detection method for N-methyl-N-(N,N-dimethylaminoethyl) ethanolamine in foam. The detection method comprises: extracting and treating a foam sample to be detected, using acetonitrile-water mixture as an extraction solvent, filtering the extraction liquid through a filter membrane to obtain an extraction liquid; and detecting the extraction liquid by using a liquid chromatography mass spectrometry instrument. The analysis and test method has low detection limit, good precision, and high sample standard addition recovery rate, and meets the test requirements of N-methyl-N-(N,N-dimethylaminoethyl) ethanolamine in foam. The target compound has a good linear relationship (r 2 >0.9998) in the range of 0.2-100 μg / L; the detection limit and the quantitative limit are both low, the detection limit is 0.14 μg / kg, the quantitative limit is 0.47 μg / kg, the relative standard deviation is less than 2.8%; and the sample standard addition recovery rate is 93.5%-109%.

The application discloses a kind of detection methods of dimethyl fumarate in food, it is related to chemical detection analysis technical field, comprising the following steps: S1, based on standard solution sample configuration standard curve;S2, the formula of purifying tube is selected and three representative samples, and based on purification scheme, sample is purified;S3, set two standard curve concentration points, carry out multiple sample data acquisition;S4, to three samples are detected in parallel double sample, and the detection limit level of sample, 1 times quantification limit level, 2 times quantification limit level and 5 times quantification limit level are 6 parallel standard addition test, based on experimental data is verified.The application makes that the dosage of organic reagent is saved about 80%, operation time is saved about 75%, the addition of internal standard DMM effectively calibrates the influence that target DMF changes with time and matrix interference, guarantees the result accuracy, while operation process is simple, to reduce the requirement of laboratory to personnel operation skill.

The invention discloses a method for detecting the content of dimethylamino acetaldehyde in a reaction solution. The method comprises the following steps: S1, preparing a system applicability solution, a dimethylamino acetaldehyde reaction solution, a test sample stock solution, an alcohol stock solution, a reference substance standard series solution and a test sample solution; s2, qualitatively detecting a system applicability solution by adopting a gas chromatographic method; and S3, detecting the blank control solution by adopting a gas chromatographic method, quantitatively detecting the content of alcohol substances in the reference substance standard series solution and the test solution, and calculating the content of dimethylamino acetaldehyde in the test solution according to a standard addition method. The background of the reference substance standard series solution is similar to the components of the test solution, and the content of alcohol substances in the reference substance standard series solution and the test solution is quantitatively detected by a gas chromatography standard addition method, so that the accuracy and reliability of a detection result are ensured; the method is high in specificity, simple and rapid to operate, accurate in result, efficient, high in precision and harmless to a chromatographic column and an instrument.

The invention discloses a benzo [a] pyrene on-site rapid quantitative detection method and system and a storage medium. The detection method comprises the following steps: automatically collecting an original sample fluorescence spectrum of a to-be-detected sample, adding a preset amount of a standard solution of a safety standard substance, collecting a labeled spectrum, establishing a dual-mode dynamic correction framework, and realizing self-calibration by utilizing the response of the labeled safety standard substance; the signal intensity of a safety standard substance peak and a benzo [a] pyrene peak is extracted according to a preset peak window, the response coefficient and the concentration increment of a standard substance are calculated through an internal standard method, and the concentration of benzo [a] pyrene in a sample is calculated through a relative response factor. Complex correction and quantification processes are carried in a storage medium or a detection system and converted into one-button operation, and the method can be used for a small fluorescence spectrometer to realize on-site rapid quantitative detection of benzo [a] pyrene.

The invention belongs to the technical field of chemical analysis and quantitative detection, particularly relates to a method for determining trace choline chloride in a complex matrix of a blastocyst culture solution, and provides a method for determining trace choline chloride in the complex matrix of the blastocyst culture solution by using a standard addition method. The method has better specificity, linearity, precision and accuracy, overcomes the interference of a complex matrix in the blastocyst culture solution, is simple and convenient to operate, is accurate and reliable, and overcomes the problem that the trace content of choline chloride in the blastocyst culture solution product cannot be accurately detected by the existing choline chloride content analysis method.

The invention provides a gas chromatography detection method for determining benzene series in water by optimizing a split ratio, and belongs to the technical field of ecological environment monitoring. In a chromatographic column screening stage, an analytical column meeting the separation degree requirement is selected, and after a split ratio-separation degree-peak area response value three-dimensional data set is established, a split ratio optimization prediction model is input; according to the model, features are extracted by using multi-scale convolution, methanol interference signals and target object response signals are separated through an independent component analysis blind source separation technology, optimal split ratio parameters are output through parallel full-connection prediction branches and a multi-target weighted fusion layer, and optimal headspace balance conditions are determined in combination with a Gaussian process regression Bayesian optimization algorithm. A peak identification and deconvolution integral separation algorithm is adopted to process overlapped peaks to establish a calibration curve, a matrix-containing interference sample is corrected by adopting a standard addition method, and the technical problem that separation effect and detection sensitivity of split ratio parameters are difficult to consider at the same time is solved.

The invention belongs to the field of portable and trace detection of pollutants, and particularly relates to an aM-level detection method of perfluorooctanoic acid. The method comprises the following steps: firstly, triggering enzyme-free catalysis hairpin assembly by using a PFOA aptamer to generate double-stranded DNA to activate a CRISPR-Cas12a system, so as to realize target cyclic amplification and signal transduction; a DNA signal is converted into a copper element signal through a gold-core copper-shell nanoparticle labeling strategy, and multi-stage signal amplification is achieved; and finally, quantifying a Cu signal at 327 nm by adopting a capillary tube-micro plasma emission spectrometer driven by a self-developed lithium battery. The detection limit of the platform to PFOA reaches 0.50 aM, which is 4 orders of magnitude lower than the American EPA standard; the linear range spans 6 orders of magnitude (2.5 aM-2.5 pM); the standard addition recovery rate of 6 kinds of complex environment water samples (landfill leachate, breeding wastewater and the like) and 3 kinds of dairy products is 95.54%-108.63% (RSDlt; 5%).

The invention discloses a method for determining the content of hexavalent chromium in fingerprint-resistant waste liquid, which comprises the following steps: heating and demulsifying a fingerprint-resistant waste liquid sample under an acidic condition to separate solid from liquid, and precipitating and separating hexavalent chromium by using zinc hydroxide; inductively coupled plasma emission spectrometry is adopted for detection, after a treated sample is added into an inductively coupled plasma emission spectrometer through a sample injector, the hexavalent chromium element is gasified, ionized and excited in a plasma torch, a characteristic spectral line is radiated, and the intensity of the characteristic spectral line is in direct proportion to the concentration of the element within a certain concentration range; and the concentration of the hexavalent chromium element is accurately determined by detecting the strength of the characteristic spectral line of the hexavalent chromium element. Compared with a diphenylcarbazide spectrophotometric method, the method for determining the hexavalent chromium in the fingerprint-resistant waste liquid by adopting the inductively coupled plasma emission spectrometry has the advantages of strong anti-interference capability, high sample adding standard recovery rate, simplicity and convenience in operation, high automation degree, capability of improving the detection precision and capability of saving the detection cost.

One mode of the present invention is a quantitative analysis method of quantifying a target compound contained in a sample derived from an organism, including: a category selection step of receiving selection by a user of one category containing a target sample from among categories determined in advance for the sample; a preprocessing step of performing a predetermined preprocessing including derivatization on the target sample; a measurement execution step of executing GC / MS analysis on the preprocessed target sample based on analysis condition information provided from a database storing the analysis condition information for the GC / MS analysis and calibration curve information for quantification by a standard addition method for each category; and a quantitative processing step of performing quantitative processing based on data obtained in the measurement execution step using the calibration curve information corresponding to the selected category, the calibration curve information being provided by the database.