58 results about "Peak area" patented technology

The invention relates to an overlapped chromatographic peak positioning and splitting method and system based on a numerical stable function. The method comprises the following steps: de-noising chromatographic data and correcting a baseline; calculating a second derivative by using SG filtering, grouping continuous points according to a negative threshold value, and determining an initial position of each peak by using a second-order minimum value; establishing a peak function of bidirectional exponential correction by taking a peak position as an initial value, setting parameters and boundaries such as area, center, width, trailing and the like, constructing a residual error minimization target, and performing robust fitting by adopting a trust region reflection algorithm; and indexes such as suitability, output peak area, center, broadening, separation degree, theoretical plate number and the like are verified by residual errors. According to the method, valley point or prior component information is not needed, the method is insensitive to noise and baseline drift, serious overlapping and trailing / leading edge peaks of multiple components can be effectively processed, convergence is high, the method is insensitive to initial values, parameters can be expanded to different peak shapes, and the method is suitable for qualitative and quantitative analysis of automatic and high-flux chromatographic data.

The invention discloses a radioactive liquid activity detection method, device and equipment, and relates to the field of nuclear energy. The method comprises the following steps: acquiring a to-be-detected water sample, and respectively inputting the to-be-detected water sample into a detector to obtain a detector original pulse signal and a detector fast signal corresponding to the to-be-detected water sample; performing FPGA time window coincidence processing based on the detector original pulse signal and the detector fast signal to obtain a new energy spectrum corresponding to the to-be-detected water sample; obtaining a preprocessed theoretical energy spectrum template, and inputting the theoretical energy spectrum template and the new energy spectrum into the peak decomposition network model to obtain a characteristic peak area list of the target nuclide; and obtaining an efficiency curve of the detector, and obtaining an activity detection result of the target nuclear element in the to-be-detected water sample based on the characteristic peak area list of the target nuclide and the efficiency curve. According to the method, the final result is determined by combining the theoretical energy spectrum template, the original pulse signal of the detector and the fast signal of the detector, so that the spectrum unfolding error of the overlapping peak can be reduced, and the recognition accuracy of the mixed system is effectively improved.

The embodiment of the invention discloses a method and device for testing foam seepage characteristics of a heterogeneous porous medium, electronic equipment and a storage medium, and relates to the technical field of fluid mechanics and nuclear magnetic resonance. The method comprises the steps that a heterogeneous porous medium sample with a clear permeability level difference is prepared, and the permeability level difference of the heterogeneous porous medium sample is determined; setting test parameters according to the permeability level difference of the sample, calibrating imaging parameters of the low-field nuclear magnetic resonance equipment, and setting a weighting mode; performing foam flooding treatment on the sample according to the set injection parameters, acquiring a spectrum of the sample according to the test parameters when foam is injected into a set amount, and acquiring nuclear magnetic imaging of the sample through low-field nuclear magnetic resonance equipment according to imaging parameters and a weighting mode; according to the relaxation characteristic of the spectrum, the main peak endpoint value is used for dividing the pore channel, the foam sweep degree is calculated according to the spectrum peak area of the spectrum, and the foam plugging strength is calculated according to the signal amplitude of nuclear magnetic imaging. According to the method, the problems of poor visualization adaptability and lack of evaluation systems in the prior art are solved.

To provide a photosensitive resin composition and light-shielding film that achieve both high light-shielding properties and reduced reflectivity on both the glass substrate side and the film side, while also being environmentally friendly by using extremely low amounts of fluorine and meeting requirements such as PFAS regulations. [Solution] A photosensitive resin composition characterized by containing components (A) to (F) and satisfying both (i) and (ii) below. (i) When a cured film of the composition is deposited on a glass substrate with an average film thickness in the range of 0.5 to 4.0 μm, and the surface of the film is measured by XPS, the peak area A of SiO2 in the peak fit analysis of the Si2p3 / 2 peak is... SiO2 And, peak area A SiO The ratio (A SiO2 / A SiO The value must be between 0.10 and 10.0. (ii) The ratio of the amount of element F to the total amount of elements Si, C, O, and F present on the surface of the film [F / (Si+C+O+F)] is 5.0% or less.

The invention relates to an underwater gamma-ray energy spectrum repeatability analysis method and device and a storage medium. The method comprises the following steps: acquiring a gamma-ray energy spectrum group measured underwater; performing spectrum unfolding on the gamma-ray energy spectrum group based on a Gold iterative deconvolution spectrum unfolding algorithm to obtain energy of gamma incident rays; solving a peak value and a peak area of the gamma-ray energy spectrum group by adopting a gravity center method; determining a first relative standard deviation corresponding to the peak value and a second relative standard deviation corresponding to the peak area; and determining the repeatability of the gamma-ray spectrum group based on the first relative standard deviation and the second relative standard deviation. According to the method, the background is deducted in a spectrum unfolding mode on the basis of the Gold iteration deconvolution spectrum unfolding algorithm, then the peak value and the peak area are calculated, the background deduction error is reduced, the repeatability is improved, meanwhile, the Gold iteration deconvolution spectrum unfolding algorithm reduces the measurement time, and the measurement accuracy is improved. Therefore, the technical effects of reducing the error of background deduction and improving the repeatability based on the Gold iteration deconvolution spectrum unfolding algorithm are realized.

The invention discloses a method for determining the solution concentration in the crystallization process of 3, 4-dinitrofurazan furoxan oxide, and relates to the technical field of energetic crystal materials. According to the method, an EasySampler and HPLC (High Performance Liquid Chromatography) combined method is utilized, the solubility of DNTF is measured, a standard curve of DNTF solution concentration and peak area is established by utilizing a high performance liquid chromatograph, then the EasySampler is utilized to sample a crystallization process and perform HPLC analysis, and then the solution concentration at each moment is calculated by utilizing an equation of the standard curve. According to the method, EasySampler equal interval sampling is combined with off-line HPLC (High Performance Liquid Chromatography) analysis, and a curve that the concentration of the main component of the solution changes along with the temperature is constructed. In the dominant period of crystal growth, the concentration change rate and the solid-liquid interface area are in an approximately linear relationship. The experimental data provides a necessary demonstration basis for subsequent improvement of a non-ideal system crystallization kinetics theory.

The invention discloses a Toci full-spectrum anion truth value monitoring method, system, equipment and medium, and relates to the technical field of chemical analysis. The method comprises the following steps: acquiring a response signal in a target water sample, drawing a background response peak and a target response peak by taking time as an abscissa axis and the response signal as a ordinate axis, acquiring a peak shape parameter of the background response peak, calculating a difference value between the peak shape parameter and a preset reference peak shape parameter, converting the difference value into a feature correction instruction, and correcting the feature correction instruction according to the difference value. The first peak area of the real response peak is calculated; the initial concentration of target anions is obtained according to the first peak area; the background concentration of background anions is obtained; the concentration adjustment coefficient is calculated according to the background concentration; the target concentration of the target anions is obtained. By implementing the technical scheme provided by the invention, the effect of improving the accuracy of monitoring the target anions is achieved.

The invention discloses a high-flux mixed solution quality control method based on relative response factors. According to the method, by introducing an internal standard reference substance and calculating a relative response factor Rr of each target analyte relative to the internal standard, synchronous and rapid calculation and stability dynamic evaluation of all component concentrations in a solution are realized, and the method comprises the following steps: selecting and preparing an internal standard solution; analyzing the mixed solution and the internal standard under the same condition to obtain a chromatographic peak area; calculating Rr; monitoring the change of Rr along with time to judge the component stability; and calculating the current concentration of each component based on the stable Rr value and the interior label information. According to the method, only one or a small number of internal standards are needed to replace a single standard prepared for each component in a traditional method, consumption (about 90%) and workload of standard substances are remarkably reduced, unstable components can be sensitively recognized, and an efficient, economical and reliable quality control solution is provided for high-throughput detection in the fields of environmental monitoring, food safety and the like.

The invention relates to a method for measuring the concentration of tetrachloroethylene in water, which comprises the following steps: (1) detecting a standard working solution of tetrachloroethylene by using a high performance liquid chromatograph to obtain a standard working curve of the tetrachloroethylene absorption peak area and absolute concentration of the standard working solution of tetrachloroethylene; (2) detecting a water sample to be detected by using the high performance liquid chromatograph to obtain the tetrachloroethylene absorption peak area of the water sample to be detected; a mobile phase used in the detection of the high performance liquid chromatograph comprises an organic phase and ultrapure water, and the volume ratio of the organic phase to the ultrapure water is (70-90): (30-10); the detection wavelength of the detection is 212 to 216 nm; the temperature of a column oven of the high performance liquid chromatograph is 35-40 DEG C. According to the method disclosed by the invention, the peak appearance time is short, the separation effect of the detected main peak and the impurity peak is good, the fitting degree of the obtained standard working curve is high, the separation degree of the main peak and the impurity peak in the detection of an actual water sample containing tetrachloroethylene is high, and the detection result is reliable.

[Problem] To provide a workpiece processing film and a workpiece processing method with which it is possible to hold a workpiece while keeping an attachment surface clean by being attached to the workpiece during workpiece processing. [Solution] This workpiece processing film is used for processing a workpiece, wherein: the workpiece processing film is a substrate-less double-sided adhesive film; and when 10 μL of a toluene solvent, obtained by immersing a workpiece processing film having a size of 80 mm×100 mm in 15 g of toluene at 25ºC for 24 hours, is measured by gel permeation chromatography, and the measurement results are shown as a chromatogram in which the vertical axis is a detection voltage and the horizontal axis is an elution time from the introduction of the toluene solvent to the elution from a column, the peak area of a detection component from an elution time corresponding to a time when the number-average molecular weight in terms of standard polystyrene is 2,500,000 to an elution time corresponding to a time when the number-average molecular weight in terms of standard polystyrene is 200 is at most 4,000 mV∙sec.

The application discloses a method for drawing the dissolution curve of perphenazine tablets by high performance liquid chromatography, comprising the following steps: adding perphenazine tablets and preheated dissolution medium into a plurality of dissolution cups in sequence under the light-proof environment; using a dissolution instrument to obtain dissolution liquid by sampling the plurality of dissolution cups for multiple times, 5mL of the dissolution liquid is sampled each time and the isothermal dissolution medium is supplemented at the same time; filtering the dissolution liquid, taking the filtered liquid to obtain the test sample solution, and storing the test sample solution for use in the dark; preparing the control sample solution with the perphenazine tablet concentration of 2.012ug / mL and 4.024ug / mL respectively, and storing the control sample solution for use in the dark; using a high performance liquid chromatograph, sucking the test sample solution and the control sample solution into the high performance liquid chromatograph according to preset chromatographic conditions; recording the peak area, and calculating the dissolution amount at each time point according to the formula; taking the dissolution time as the horizontal coordinate and the accumulated dissolution amount at each time as the vertical coordinate, and drawing the dissolution curve.

The invention belongs to the technical field of analysis and detection, and particularly relates to a sulfur hexafluoride isotope abundance detection method. The sulfur hexafluoride isotope abundance detection method provided by the invention comprises the following steps: detecting a to-be-detected sample by using a gas chromatograph-mass spectrometer to obtain a total ion flow chromatogram of sulfur hexafluoride; the gas chromatography test conditions are as follows: a DB-5MS capillary column is adopted, the split ratio is (20-80): 1, and the sample size is 1-10 L; the mass spectrum test conditions comprise that the voltage of a multiplier is + 300 to + 600, and the half-peak width is less than 0.6; and carrying out < 32 > SF < 5 + >, < 33 > SF < 5 + > and < 34 > SF < 5 + > ion extraction on the total ion chromatogram of sulfur hexafluoride to respectively obtain the peak area of < 32 > SF < 5 + >, the peak area of < 33 > SF < 5 + > and the peak area of < 34 > SF < 5 + >, and calculating the abundance of < 32 > SF < 5 + >, the abundance of < 33 > SF < 5 + > and the abundance of < 34 > SF < 5 + >. The detection method provided by the invention has the advantages of economical efficiency, high analysis speed and high accuracy.

This polythiol composition comprises a compound (A) represented by formula (1) and a compound (B) represented by formula (2). In high-performance liquid chromatography measurement performed using a prescribed detector, the peak area of the compound (B) is 9.0 area% or less with respect to 100 area% of the peak area of the compound (A). (In formula (1), the plurality of R's are identical or different from each other, and each represent a divalent hydrocarbon group having 1-6 carbon atoms.) (In formula (2), the plurality of R's are identical or different from each other, and each represent a divalent hydrocarbon group having 1-6 carbon atoms. a1, b1, c1, d1, e1, f1, g1, and h1 are identical or different from each other, each represent an integer of 0-3, and the sum of the same is 6.)

The invention relates to the field of substance purity analysis methods, and discloses a method for analyzing the purity of o-phthalic anhydride by using gas chromatography, which comprises the following steps: firstly, preparing a standard solution of which the concentration of each component is close to that of each component in crude phthalic anhydride to be analyzed, and analyzing the standard solution for more than three times; calculating a correction factor of each substance after the peak area repeatability error of each substance is less than 3%; and inputting the correction factor into a method-component table, comparing the spectrogram of the to-be-detected sample solution with the spectrogram of the standard substance solution, determining peak localization of corresponding substances in the to-be-detected sample solution according to retention time, and calculating the purity of phthalic anhydride in the to-be-detected sample by adopting an area correction normalization method. The method is simple to operate, short in analysis time and good in stability and reproducibility.

The invention discloses a method for detecting dibenzoyl thiamine disulfide and related substances thereof. The detection method comprises the following steps: preparing dibenzoyl thiamine disulfide reference substance solutions with different concentrations, recording corresponding chromatograms and corresponding peak areas by adopting a high performance liquid chromatograph, and drawing a dibenzoyl thiamine disulfide standard curve; respectively drawing standard curves of the related substances in the same way; the method comprises the following steps: injecting a to-be-detected sample solution into a high performance liquid chromatograph, recording chromatograms under the wavelengths of 233 nm and 280 nm, and determining the nature of a main peak and impurity peaks by comparing the retention time of each peak in the to-be-detected sample solution, a p-dibenzoylthiamine disulfide reference substance solution and a related substance solution. The invention provides a high performance liquid chromatography which is used for analyzing related substances in diphenylthiamine, and the method is good in specificity, high in sensitivity, low in detection limit, simple to operate, efficient in separation and capable of being used for realizing quality control of the compound.

Pentacyclopentadecandimethanol product in which the area ratio of the sum of the areas of a peak group occurring in the range of the relative retention time of 0.70 to 0.95 to the total peak area is 1.00% or less in a liquid chromatographic analysis under the following conditions, when the relative retention time of the peak of pentacyclopentadecandimethanol is determined to be 1.00: (Conditions for liquid chromatographic analysis) Analysis columns: two columns (mean particle size 3 µm, mean pore size 1.5 nm, length 15 cm × inner diameter 6.0 mm), whose base material is styrenedivinylbenzene, coupled with one column (mean particle size 3 µm, medium pore size 2.0 nm, length 15 cm × inner diameter 6.0 mm), whose base material is styrenedivinylbenzene, are used. Sample concentration: 5 wt% (dilution solvent tetrahydrofuran) Column oven temperature: 40°C Carrier: Tetrahydrofuran Column liquid flow rate: 0.35 ml / min Detector: Refractive index detector (cell temperature: 40°C)

The application provides a testing method for carbon coating completeness of a silicon-based material, and belongs to the technical field of material testing. The method comprises the following steps: placing a first mass of strong alkaline material and a second mass of testing silicon-based material in a reaction tank to perform a reaction, and obtaining first current information output by a detection device; placing the first mass of strong alkaline material and a contrast material in the reaction tank to perform a reaction, and obtaining contrast current information output by the detection device; drawing a test image based on the first current information and the contrast current information; and calculating the carbon coating completeness of the testing silicon-based material based on the peak area and the peak current value of the testing silicon-based material in the test image, the peak area and the peak current value of the contrast material, and the second mass and the mass of the contrast material. The testing method for carbon coating completeness of the silicon-based material provided by the application can simply and conveniently test the carbon coating completeness of the silicon-based material.

The invention belongs to the field of chemistry, and relates to a method and a system for rapidly detecting TiC in carbide slag. The method comprises the following steps: preparing a standard sample: preparing a series of carbide slag standard samples with known TiC content; acquiring XRD (X-Ray Diffraction) data: scanning the standard sample and the sample to be detected by using an X-ray diffractometer in a range of 2theta = 34-38 degrees to obtain a diffraction pattern; processing data and drawing a standard working curve: extracting a characteristic diffraction peak of TiC at 2theta = 36.1 + / -0.2 degrees, carrying out area integration, and establishing a standard working curve of the TiC content and a peak area integral value; and determining an unknown sample: carrying out the same treatment on the sample to be detected, substituting the peak area integral value into the standard working curve, and calculating to obtain the TiC content. According to the method, a diffraction peak with a diffraction angle 2theta of 36.1 degrees is adopted for fitting and then quantitative analysis is performed, so that the problem of long consumed time of an existing method for measuring the content of TiC in the carbide slag is solved.

The present application relates to a kind of chromatographic data optimization processing method of gas chromatograph, belong to data analysis technical field, comprising: based on the detection data of septum, determine the aging state grade of septum;Based on the aging state grade of septum and the material of septum, determine the release material of septum;Obtain the chromatographic data of sample analysis by gas chromatograph, remove the interference peak corresponding to the release material of septum from chromatographic data, generate first chromatographic optimization data;Based on first chromatographic optimization data and the aging state grade of septum, determine sample material loss compensation numerical value, and optimize chromatographic peak area value in first chromatographic optimization data, generate second chromatographic optimization data.The method is based on septum aging prediction, interference peak removal and quantitative correction linkage, both solve the problem of peak shape pollution, and also solve the problem of quantitative inaccuracy caused by aging, and then the reliability of gas chromatographic data and the accuracy of analysis result can be improved.

The invention relates to the technical field of medicines, in particular to a process quality control method of semeglutide, which is characterized in that a compound 1 has serious solution instability and can be quickly degraded along with time, and in a subsequent synthesis process, it must be ensured that an intermediate which is prepared freshly or is confirmed to be qualified in purity is used, and high performance liquid chromatography process monitoring is introduced. The invention provides a high performance liquid chromatography real-time monitoring method matched with a compound 1 to accurately control the reaction process so as to effectively inhibit an impurity chain reaction caused by degradation of raw materials, and for the characteristics of instability and continuous decomposition of the compound 1 in a solution, the invention provides a high performance liquid chromatography real-time monitoring method matched with the compound 1. The raw material conversion rate and the generation conditions of key over-modified impurities 1 and 2 can be synchronously monitored in the reaction process, and the raw material peak area smaller than or equal to 2.0% and the specific impurity peak area smaller than or equal to 5.0% (or 2.0%) serve as scientific and accurate reaction termination criteria. According to the active process control strategy, accumulation of impurities is inhibited from the source, and the problems of inaccurate feeding and batch difference caused by degradation of intermediates are solved.

The invention belongs to the technical field of deuteration rate detection, and particularly relates to a low-deuteration water deuteration rate detection method, which comprises: 1) preparing a heavy water standard sample with a known deuteration rate, carrying out a nuclear magnetic hydrogen spectrum test, and recording the water peak area; (2) estimating the deuteration rate of the deuterium-depleted water sample to be detected, then mixing a proper amount of the deuterium-depleted water sample with a proper amount of the heavy water standard sample, and preparing a mixed heavy water sample with the estimated deuteration rate of 98% or above; (3) carrying out nuclear magnetic hydrogen spectrum test on the mixed heavy water sample, recording the water peak area, and calculating the deuteration rate by using the water peak area according to an external standard method; and (4) calculating the deuteration rate of the deuterium-depleted water sample. The detection method overcomes the defect that a nuclear magnetic resonance hydrogen spectrum method cannot accurately measure the deuterium-depleted heavy water (deuteration rate lt; the deuterium content in a high range (more than or equal to 98%) is difficult to detect, the limitation that an external standard method can only detect the isotope abundance (more than or equal to 98%) of deuterium in a relatively high range is broken through, and meanwhile, the method is high in analysis precision and accuracy, low in equipment investment, simple and convenient to operate and low in analysis cost.

The invention belongs to the technical field of medicine detection, and particularly relates to an HPLC (High Performance Liquid Chromatography) method for simultaneously detecting LXH-5 and impurities thereof. Respectively injecting the blank solution, the reference solution and the test solution into a liquid chromatograph, recording chromatograms, calculating the content of LXH-5 in the test solution according to a peak area normalization method, calculating the content of impurities LXH-3 and / or LXH-4 in the test solution according to the peak area according to an external standard method, and determining the content of the impurities LXH-3 and / or LXH-4 in the test solution according to the external standard method. And calculating according to a main component self-contrast method to obtain the content of other impurities in the test solution. The method disclosed by the invention is good in stability, high in precision, good in reproducibility and good in degree of separation between a main peak and each impurity peak, and provides an analysis means for quality control of LXH-5, so that the quality of an LXH-1211 final product is more effectively controlled.

This application provides a ternary cathode material, its preparation method, and its application. The ternary cathode material includes materials that satisfy 0 < P. cycle ≤1, where; S0 and S1 are the peak areas of the number distribution curves of the initial cathode material and the cathode material after powder pressing, respectively, in au; BET0 and BET1 are the specific surface areas of the initial cathode material and the cathode material after powder pressing, respectively, in m. 2 / g; α represents the Li / Ni mixing ratio of the initial cathode material, expressed in %. By constructing a quantitative correlation model of mechanical stability (S), interface properties (BET), and structural defects (α), the accurate prediction and optimization of the material's cycle performance can be achieved.

Surface-treated spherical silica, having a median diameter d50 of 0.5 μm to 20 μm, a product A×d50 of a BET specific surface area A (m2 / g) and the median diameter d50 (μm) being 2.7 (μm·m2 / g) to 5.0 (μm·m2 / g), a peak area of an amine in chromatography being 70% or more of a theoretical value, and a symmetry coefficient S of 8 or less in the chromatography.

The invention discloses a method for detecting related impurities of piracetam by high performance liquid chromatography. The detection method comprises the following steps: preparing a test solution and diluting to obtain a contrast solution; respectively preparing reference substance solutions of impurities A, B, C and D as positioning solutions; under the same chromatographic condition, analyzing each positioning solution, and determining the retention time of an impurity peak; sequentially injecting the test solution and the contrast solution, identifying impurity peaks in the test solution according to retention time, integrating to obtain a peak area (Ai), and integrating a main peak of the contrast solution to obtain a peak area (Astd); the single impurity content (%) is calculated according to the formula: the single impurity content (%) = Ai / (Astd * D) * 100%, and D is the dilution ratio of the contrast solution relative to the test solution. The method has the advantages of strong specificity and high separation degree, and can effectively realize simultaneous separation and quantification of multiple impurities.

The invention relates to a chromatographic data optimization processing method of a gas chromatograph, which belongs to the technical field of data analysis, and comprises the following steps: determining the aging state grade of a shock insulator based on the detection data of the shock insulator; based on the aging state grade of the isolation pad and the material of the isolation pad, determining a release substance of the isolation pad; the method comprises the following steps: acquiring chromatographic data obtained by analyzing a sample through a gas chromatograph, and removing an interference peak corresponding to a release substance of a shock insulator from the chromatographic data to generate first chromatographic optimization data; and determining a sample material loss compensation value based on the first chromatographic optimization data and the aging state grade of the isolation pad, and optimizing a chromatographic peak area value in the first chromatographic optimization data to generate second chromatographic optimization data. According to the method, on the basis of aging prediction of the shock insulator, interference peak removal and quantitative correction are linked, the problem of peak shape pollution is solved, the problem of inaccurate quantification caused by aging is solved, and then the reliability of gas chromatography data and the accuracy of analysis results can be improved.

Time-of-flight mass spectrometry methods, which include: Digitizing an initial signal output by an ion detector to generate an initial digitized signal; Detecting one or more peaks in the first digitized signal and determining a first area S0 of the one or more peaks and a first arrival time T0 of the one or more peaks, thereby forming a first list of data pairs; and Determine whether the first surface S0 is a first threshold surface S max exceeds or does not exceed the first threshold area S max a peak area that indicates an essentially simultaneous arrival of two ions which the ion detector cannot resolve, and where, when it is determined that the first area S0 is the first threshold area S maxdoes not exceed, the procedure further comprises recording the first area S0 and the first arrival time T0 or data derived from the first area S0 and the first arrival time T0 in a first histogram, and wherein, if it is determined that the first area S0 is the first threshold area S max The procedure includes not including the first area S0 and the first arrival time T0, or data derived from the first area S0 and the first arrival time T0, in the first histogram.

The application discloses a kind of insulating oil dissolved gas on-line monitoring device's mark gas self-calibration method and system, comprising: under the condition of normal mark gas pressure, continuous mark gas calibration is carried out;Determine the relative standard deviation of gas component concentration or peak height / peak area under continuous mark gas calibration, if the relative standard deviation is not less than the set threshold, continue to carry out mark gas calibration until the relative standard deviation is less than the set threshold, and the number of continuous calibration does not exceed the maximum calibration number;If the maximum calibration number is reached, the relative standard deviation still does not meet the requirements, then trigger calibration abnormal alarm;When the relative standard deviation meets the requirements, the average concentration of gas components or the average value of peak height / peak area is obtained, which is compared with the last calibration data and the first calibration data, and the termination calibration process, correction mark gas coefficient or trigger calibration abnormal alarm operation is carried out according to the comparison result. Periodic mark gas calibration of monitoring devices with different detection principles is realized, and the operation and maintenance workload is reduced.

The invention discloses a method for detecting organic matters in water, which relates to the field of analysis and detection and comprises the following steps: S1, preparing a plurality of standard solutions with different known concentrations; s2, drawing a standard curve according to the measured peak areas of the plurality of standard solutions and the corresponding known concentrations; s3, preparing a plurality of water sample solutions with different known concentrations; s4, obtaining an organic phase solution of the plurality of water sample solutions through liquid-liquid extraction; s5, obtaining peak areas of multiple organic phase solutions, and determining actually measured concentrations of the organic phase solutions according to the standard curve; s6, drawing a modeling curve; s7, performing liquid-liquid extraction on the water sample to be detected, collecting an organic phase, measuring the peak area of the organic phase through gas chromatographic analysis, and determining the actually measured concentration of the organic phase according to the standard curve; and obtaining the real concentration of the water sample to be detected by referring to the modeling curve according to the actually measured concentration. The extraction loss can be compensated, and the accuracy of detecting the organic matters in the water is high.

A film which is an ethylene tetrafluoroethylene copolymer film, characterized in that the crystallinity, which is determined by the following formula (1) from the peak area S 20 in the vicinity of 2θ = 20°, the peak area S 19 in the vicinity of 2θ = 19° and the peak area S 17 in the vicinity of 2θ = 17° in the diffraction intensity curve obtainable by an X-ray diffraction method, is from 55 to 70%, and the fraction of the quasicrystalline layer obtainable by the following formula (2) is from 10 to 20%, Crystallinity (%) = (S 19 + S 20) / (S 17 + S 19 + S 20) × 100 Percentage of quasicrystalline layer (%) = S 20 / ( S 17 + S 19 + S 20 ) × 100