74 results about "Flame ionization detector" patented technology

The invention relates to a method for simultaneously detecting three related substances in an olpinapone starting material. According to the detection method, the three related substances in an opinapone starting material are simultaneously detected by using a gas chromatographic method of a hydrogen flame ionization detector. According to the detection method, the problem that three related substances cannot be detected simultaneously due to weak ultraviolet absorption and large difference under the liquid chromatography condition can be solved, the matrix effect generated by an opiapone starting material under the gas chromatography condition can be eliminated, the condition that the separation degree of the three related substances is poor is improved, and the detection accuracy is improved while the detection efficiency is improved. And the true and reliable quality of the initial material of the olpinapone is also ensured. The method can be used for simultaneously and quantitatively detecting three related substances higher than 0.02% in the initial material of the opinapone, and is high in sensitivity, good in separation degree, high in practicability and simple and rapid in detection process.

The invention relates to the technical field of novel material chemical analysis, and discloses a triphenyl phosphate purity standard substance valuing method, which comprises the following steps: filtering, drying, dissolving and sterilizing a triphenyl phosphate sample; a triphenyl phosphate sample is comprehensively analyzed from different angles by comprehensively applying a GC-MS (Gas Chromatography-Mass Spectrometry) technology, an NMR (Nuclear Magnetic Resonance) technology, an infrared spectroscopy, a gas chromatography-flame ionization detector method, a Karl Fischer method and an inductively coupled plasma mass spectrometry, and finally, the purity value of the triphenyl phosphate purity standard substance is calculated by a mass balance method. The method provides a scientific and accurate technical means for quality control and standard formulation of the triphenyl phosphate product, has important practical application value for related industries in the fields of chemical engineering and material science, and is beneficial for improving the product quality and promoting industrial upgrading.

The invention discloses a method and system for measuring and calculating volatile organic compounds in exhaust gas discharged by a stationary pollution source, and the method comprises the steps: determining a sampling position and a sampling point of the exhaust gas discharged by the stationary pollution source, collecting the main product yield, main raw material or fuel consumption of a preset enterprise, and building a database; the method comprises the following steps: collecting waste gas through a waste gas sampling device, acquiring a waste gas chromatogram by adopting a mass spectrum detector, acquiring low-molecular-weight components by adopting a flame ionization detector FID, and acquiring volatile organic components; dividing the molecular weight low components into different concentration series, performing gas chromatographic analysis, drawing a working curve, and calculating correlation coefficients of the molecular weight low components of different concentration series and response areas; analyzing other compounds by adopting a mass spectrometric detector, calculating correlation coefficients of other compounds and response areas, calculating the concentration of the volatile organic compounds, and establishing pollution source data according to the database; and carrying out regression analysis by utilizing the database and the volatile organic compound concentration, and outputting a result.

The invention discloses a portable gas chromatographic peak automatic identification and integration method. According to the method, filtering processing is carried out on the obtained hydrogen flame ionization detector signal based on wavelet transform, a smooth curve is reconstructed, and a peak searching threshold value is dynamically adjusted by using a dynamic threshold value method based on the hydrogen flame ionization detector signal. And carrying out peak searching processing on the smooth curve based on the determined peak searching threshold. And carrying out secondary screening adjustment on the preliminary peak searching result, and calculating the chromatographic peak area. And finally, performing chromatographic peak matching according to the target compound retention time set by a user, and converting the peak area of each matched chromatographic peak into concentration according to the calibration curve information. According to the invention, the dynamic self-adaption of the detection threshold is realized, so that the detection threshold can adapt to chromatographic signals with different signal-to-noise ratio levels.

The utility model discloses an explosion-proof hydrogen flame ionization detector which comprises an explosion-proof shell, an ignition electrode, a collecting electrode and an electric field electrode, the explosion-proof shell comprises a detection cavity, one end of the detection cavity is provided with an air inlet, and the other end of the detection cavity is provided with an air outlet; the ignition electrode is detachably mounted on the explosion-proof shell; the collecting electrode is detachably mounted on the explosion-proof shell; the electric field electrode is detachably mounted on the explosion-proof shell; the ignition electrode, the collecting electrode and the electric field electrode are sequentially arranged from one end of the exhaust port to one end of the air inlet. The explosion-proof hydrogen flame ionization detector is small in size and light in weight, the electrode is convenient to maintain or replace after being damaged, and the use convenience is improved.

The invention discloses a Hankel singular value decomposition-based magnetic resonance spectrum water peak modeling and post-processing method. The method comprises the following steps of: acquiring original multi-channel FID (Flame Ionization Detector) signals by a PRESS sequence; combining multi-channel signals, and performing frequency correction and eddy current correction; reconstructing and deducting a time domain water peak model, and executing exponential filtering processing; and performing baseline correction by adopting an asymmetric least square method to obtain a final spectrogram. Accurate modeling and removal of residual water peaks are realized by utilizing Hankel structure matrix singular value decomposition, adaptive baseline correction is performed by introducing an asymmetric least square method, interference of the residual water peaks is effectively reduced, the baseline smoothness of a spectrogram and the distinguishability of metabolic peaks are improved, and the method can be used for realizing accurate modeling and removal of the residual water peaks under the condition of not depending on additional modulation of a collection end or increasing of sequence complexity. The time domain signals are subjected to structured matrix decomposition to realize accurate modeling and removal of residual water peaks, the signal-to-noise ratio and metabolic peak resolution of the spectrogram are remarkably improved, the operation is stable, the robustness is high, and the obtained final MRS spectrogram can meet clinical requirements.

Aspects of the present invention relate to a module (1000) for supplying hydrogen gas to a flame ionisation detector (3000). The module (1000) comprises a housing (100) configured to be mounted within a vehicle (5000), wherein the housing (100) comprises a gas flow system (1010). The gas flow system (1010) comprises a gas bottle (120) for containing hydrogen gas, wherein the gas bottle (120) is coupled within the housing (100). The gas flow system (1010) further comprises a pressure regulator (136) coupled to the gas bottle (120) configured to control a pressure of the hydrogen gas received from the gas bottle (120). The gas flow system (1010) further 10 comprises an output port (110) mounted through the housing (100) and coupled to the pressure regulator (136), the output port (110) configured to selectively couple to the flame ionisation detector (3000). In this way, the claimed invention provides a module (1000) for supplying hydrogen gas to a flame ionisation detector (3000) for hydrocarbon emissions testing onboard a vehicle (5000) that is robust and safe for inhabitants of the vehicle.

The invention provides a gas chromatographic analysis method of maleic anhydride, and belongs to the technical field of maleic anhydride analysis methods. As a maleic anhydride sample to be detected contains acidic substances and has a low response value on an FID (Flame Ionization Detector), according to the method provided by the invention, the BSTFA reagent is adopted for esterification treatment, the response value of the acidic substances in the sample to be detected is increased, a weak-polarity chromatographic column is adopted for gas chromatographic analysis, a hydrogen flame detector is used for detection, and an external standard method is used for quantitative calculation. The method provided by the invention has the advantages of high accuracy of the obtained detection result, good data repeatability and high sensitivity, can accurately analyze the maleic anhydride component concentration, has important guiding significance for quality control of maleic anhydride products produced by a device, and has good popularization and application values.

The present invention relates to a method of operating a flame ionization detector comprising providing a hydrogen containing fuel gas, providing an oxygen containing oxidizing gas, burning the fuel gas with the oxidizing gas to produce a flame, providing a sample gas to the flame to produce an at least partially ionized sample gas, wherein the sample gas contains at least one organic compound and a carrier gas, and measuring a current induced by the at least partially ionized sample gas in an electrode of the flame ionization detector. It is provided that the oxidizing gas comprises oxygen in an amount of 50 to 90 vol % of the oxidizing gas and helium in an amount of at least 10 vol % of the oxidizing gas. An arrangement comprising a flame ionization detector and a gas mixture for use in a flame ionization detector are also part of the invention.

1. Name of the designed product: hydrogen flame ionization detector. 2. Use of the designed product: for quantitative analysis of organic compounds capable of burning ionization in flame. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

This invention discloses a non-methane total hydrocarbon dilution detection device and its detection method, relating to the field of waste gas detection technology. The device includes a sampling pipeline, a return pipeline, a diversion valve, a collection pump, an air pipeline, a mixing pipeline, an electromagnetic multi-way valve, and a flame ionization detector (FID). The electromagnetic multi-way valve is connected to a gas storage valve. A first sensor and a second sensor within the gas storage valve are communicatively connected to the electromagnetic multi-way valve. Remaining mixed gas can be temporarily stored in the gas storage valve. The fullness or deficiency of the mixed gas in the gas storage valve is detected by the first and second sensors. Under the pressure of the floating pressure control module, the mixed gas maintains a certain pressure, which helps to push the mixed gas back into the FID for detection. This improves upon the problem in existing technologies where the amount of mixed gas allowed to enter the FID detector is limited, preventing the utilization of excess mixed gas and resulting in low energy efficiency.

The invention discloses a system and a method for measuring the content of each hydrocarbon in shale, and belongs to the technical field of petroleum geological exploration. The invention firstly discloses a system for measuring the content of each hydrocarbon in shale, a sample tank is connected with a reversing valve, and the reversing valve is sequentially connected with a sample inlet, a cold trap, a separation column and a first hydrogen flame ionization detector to form a gas path for detecting the content of each hydrocarbon; the reversing valve is sequentially connected with the sample inlet, the cold trap, the total content column and the second hydrogen flame ionization detector to form a total hydrocarbon content detection gas path; the invention further discloses a method for measuring the content of each hydrocarbon in shale by using the system. According to the method, two hydrogen flame ionization detectors are combined to determine the total hydrocarbon content and the content of each hydrocarbon component in the sample in parallel, and finally, the absolute content of each hydrocarbon component can be directly obtained. In addition, the ball milling tank is adopted, so that the sample is always kept in a closed state in the crushing and testing processes, and the light hydrocarbon retention capacity is remarkably improved.

Aspects of the present invention relate to a module (2000) for supplying gas to a flame ionisation detector (3000). The module (2000) comprises a housing (200) configured to be mounted within a vehicle (5000). The housing (200) comprising a gas flow system (2010), the gas flow system comprising a gas bottle (220) for containing gas, wherein the gas bottle (220) is rigidly coupled within the housing (200) via one or more mounting arms (222) extending from an interior wall of the housing (200). The gas flow system (2010) further comprises a two-stage pressure regulator (236) coupled to the gas bottle (220). The gas flow system (2010) further comprises an output port (210) mounted through the housing (200) and coupled to the two-stage pressure regulator (236). The output port (210) is configured to supply gas to a flame ionisation detector (3000). The two-stage pressure regulator (236) and the output port (210) are coupled together by first piping (237). The gas bottle (220) and the two-stage pressure regulator (236) are coupled together by second piping (234), wherein the second piping (234) comprises a tortuous path. The housing (200) further comprises a first dampener configured to suppress oscillations of the gas bottle (220) and the two-stage pressure regulator (236).

The invention relates to the field of analytical chemistry, and particularly discloses a method for determining residual solvents N, N-dimethylformamide, dichloromethane, isopropanol, ethyl acetate, methyl tert-butyl ether, ethanol, acetone, tetrahydrofuran and ethylene glycol dimethyl ether in a litamilast raw material by adopting a headspace-gas chromatography method, and a method for determining residual solvents N, N-dimethylformamide, dichloromethane, isopropanol, ethyl acetate, methyl tert-butyl ether, ethanol, acetone, tetrahydrofuran and ethylene glycol dimethyl ether in a litamilast raw material by adopting a headspace-gas chromatography method. The method comprises the following steps of: detecting by using a capillary column with 6 percent of cyanopropyl phenyl-94 percent of dimethyl polysiloxane as a stationary liquid through headspace sample introduction gas chromatography and a flame ionization detector (FID). According to the method disclosed by the invention, nine residual solvents contained in the litamilast raw material can be completely separated in one system, the separation degree is greater than 1.5, the specificity is good, interference from blank solvents and other unknown impurities is avoided, the sensitivity is high, the detection accuracy is high, and the quality of litamilast can be effectively controlled.

A jig for a pellicle storage container, a pellicle storage body, and a pellicle, wherein the amount of release of an organic gas having 20 or less carbon atoms as evaluated under the following condition 1 is 150 [mu] g or less per 1 g of the jig. Condition 1: 1 g of the cut-off piece of the clamp is arranged in a container as a test object, 200 ml of hexane is used as an extraction solvent, and an extraction solution is obtained by a Soxhlet extraction method for 6 hours in a water bath at 80 DEG C. And analyzing the obtained extracting solution by using gas chromatography. In gas chromatography, a flame ionization detector is used as a detector, the amount of components having 20 or less carbon atoms is detected, and the total amount of the detected components having 20 or less carbon atoms is used as the outgas amount.

The invention discloses a sensitivity compensation device for a hydrogen flame ionization detector, and belongs to the technical field of hydrogen flame ionization detection.The sensitivity compensation device comprises a detector shell, a gas outlet pipe is installed on the lower side of the detector shell in a penetrating mode, a polarization electrode is fixedly installed at the upper end of the gas outlet pipe, and an igniter is installed at the position, corresponding to the polarization electrode, of the outer wall of the upper side of the gas outlet pipe; a collecting electrode is installed on the upper side in the detector shell, a carbon removal assembly is installed in the gas outlet pipe and used for removing carbon deposition in the polarization electrode, a storage cavity is formed in the upper side in the polarization electrode, thermal expansion liquid is contained in the storage cavity, and a first communication groove is formed in one side of the lower end of the storage cavity; according to the present invention, with the carbon removing assembly, the carbon deposition on the inner wall of the polarization electrode can be removed during the hydrogen flame ionization detection, such that the influence on the detection result of the detector due to the non-alignment of the flame and the collector position caused by the change of the flame shape during the combustion due to the accumulation of the residue at the gas outlet of the polarization electrode during the incomplete combustion can be avoided.

The present application relates to the technical field of drug quality detection, and particularly relates to a rapid detection method for organic solvent residues in drugs. By collecting organic solvent residue parameter information of target drugs in a historical period, a comprehensive score benchmark containing the types and concentration weighted fusion is determined; based on the comprehensive score and statistical determination, the stability risk of a gas chromatography device is determined; if there is a risk, the first and second heating rates of the chromatography effluent are extracted, and the effectiveness of the chromatography effluent of the target drug is determined in combination with the peak shape index output by the hydrogen flame ionization detector; the heating rate direction and value are adjusted respectively for different peak shape abnormalities. The present application realizes active monitoring of device stability and self-adaptive correction of the heating rate, and overcomes the problem of low detection accuracy of organic solvent residues in drugs.

An ignition aid method and apparatus for a flame ionization detector, comprising a body that traverses a chimney of the detector to create turbulence in flow of gases flowing out of the detector to enhance commingling of the fuel / air mixture with an ignition source when the ignition source is active.

The invention relates to the technical field of analytical chemistry, in particular to a gas chromatographic analysis method of benzimidazole compounds, and a hydrogen flame ionization detector is used in the gas chromatographic analysis method. The capillary chromatographic column is a high-film-thickness capillary chromatographic column; the structural formula of the benzimidazole compound is shown in the specification, wherein A, B, C and D are respectively and independently selected from H, C1-C10 saturated alkyl and C1-C10 alkoxy. And the film thickness of the high-film-thickness capillary chromatographic column is 1-5 [mu] m. The gas chromatographic analysis method disclosed by the invention has the advantages of strong specificity, high sensitivity, good reproducibility, no need of derivatization pretreatment of a sample, longer service life of a selected chromatographic column, wider application range, low analysis cost, high separation degree and good reproducibility, and the problem that a benzimidazole compound test method is single is solved. The technical blank of analyzing and identifying the benzimidazole compounds by a gas chromatographic analysis technology is filled.

The present invention relates to a method for simultaneously detecting three related substances in an opicapone starting material. The method employs gas chromatography with a hydrogen flame ionization detector (FID) to simultaneously detect the three related substances in the opicapone starting material. This method not only addresses the issue of weak and highly variable UV absorption of the three related substances under liquid chromatography conditions, preventing simultaneous detection, but also eliminates the matrix effect produced by the opicapone starting material under gas chromatography conditions and improves the poor resolution between the three related substances. This method improves detection efficiency while also ensuring the authenticity and reliability of the opicapone starting material. This method can simultaneously and quantitatively detect levels of the three related substances exceeding 0.02% in the opicapone starting material, demonstrating high sensitivity, good resolution, and robust practicality, while also simplifying and facilitating a rapid detection process.

The invention discloses a method for extracting 2, 3-butanediol and glycerol in fermented grains and determining the content of 2, 3-butanediol and glycerol, and relates to the technical field of white spirit detection. The method comprises the following steps: preparing a blank matrix highly simulating real fermented grains through an enzymolysis process; an isopropanol-n-hexane mixed solvent is adopted to selectively extract a fermented grain sample, co-extraction of impurities such as pigments is effectively reduced, and purification is carried out in combination with a dispersive solid-phase extraction technology; formulating a standard curve using the simulated matrix to correct matrix effects; and finally, performing quantitative analysis through a gas chromatography-hydrogen flame ionization detector. The method thoroughly avoids the problems of complicated operation, toxicity, harm and the like of a traditional derivatization method, overcomes the defects of serious impurity interference and remarkable matrix effect in the prior art through an innovative pretreatment and matrix matching strategy, has the advantages of simplicity and convenience in operation, good selectivity, high accuracy and good repeatability, and has a wide application prospect. The method is suitable for rapid and accurate detection of fermented grains of white spirit with different flavors.

The utility model provides an integrated automatic gas chromatograph and relates to the technical field of separation and analysis instruments. Comprising a shell and a main body structure arranged in the shell, and the main body structure comprises a sample feeding module, a reaction module, a gas feeding module, an analysis module and a control module; the sample feeding module comprises a multi-way valve, and the multi-way valve is provided with a carrier gas inlet, a to-be-detected gas inlet and a sample gas outlet communicated with the reaction module; the reaction module comprises a reaction chamber and a flame ionization detector which are sequentially arranged along the flow direction of the sample gas; an inlet of the reaction chamber is communicated with a sample gas outlet of the multi-way valve, an outlet of the reaction chamber is communicated with the flame ionization detector, and a chromatographic column is arranged in the reaction chamber; the analysis module comprises a gas analysis unit; and the gas analysis unit is electrically connected with the flame ionization detector through a signal line. On the basis, the gas chromatograph solves the problem that the existing gas chromatograph has defects in the aspects of integrated layout of internal core components and automation control collaboration.

The utility model discloses an electronic pressure flow controller and a non-methane total hydrocarbon detection device, the electronic pressure flow controller is respectively connected with a hydrogen / air supply device and a flame ionization (FID) detector, the electronic pressure flow controller comprises a proportional-integral (PI) control circuit, and the PI control circuit comprises an error comparator, a signal processing circuit and a signal processing circuit, the processor is used for receiving an actual measurement value detected by the sensor and calculating a difference value between a set value and the actual measurement value; a proportional-integral (PI) controller which generates an adjustment signal based on the received difference value; and the power amplifier is used for amplifying the received output electric signal into a strong current signal and adjusting the gas flow based on the strong current signal to control the ratio of the hydrogen to the air. According to the scheme, hydrogen and air parameters are accurately adjusted through the proportion-integral controller, the air flow is automatically reduced during ignition, the preset proportion is recovered after ignition succeeds, it is ensured that high-concentration organic matter is completely ionized, flame dilution is avoided, the ionization efficiency and the detection sensitivity are improved, and stable and reliable signals are provided.

The invention discloses a method for measuring refrigerant ratio by gas chromatography, and belongs to the technical field of refrigerant gas chromatographic analysis. According to the technical scheme, a sampling steel cylinder is used for sampling, a double-valve type steel cylinder or a single-valve type steel cylinder is used for preparing a standard sample, a gas chromatographic method is used for determining the content of R404 series and R507 series refrigerants in a matching mode, chromatographic columns are aluminum oxide capillary columns, detectors are hydrogen flame ionization detectors, and the gas chromatographic method is used for determining the content of R404 series refrigerants and R507 series refrigerants in a matching mode. The used carrier gas is high-purity nitrogen. According to the invention, the defects existing in the existing use standard detection are overcome, and the same gas chromatograph can detect R404 series refrigerants and analyze R507 series refrigerants on the basis of setting parameters, so that accurate detection is realized.

The utility model provides a system for detecting and analyzing total carbon content in hydrogen containing chlorosilane gas, which relates to the technical field of detection of total carbon content in hydrogen containing chlorosilane gas, and comprises a ten-way valve, a quantitative loop, a first chromatographic column, a second chromatographic column, a converter and an FID (Flame Ionization Detector), the ten-way valve is provided with ten ports; an inlet and an outlet of the quantitative ring are communicated with the ten-way valve; an inlet and an outlet at one end of the first chromatographic column are communicated with the ten-way valve; an inlet in one end of the second chromatographic column is communicated with the ten-way valve; an inlet in one end of the converter is communicated with an outlet of the second chromatographic column; and an inlet at one end of the FID detector is communicated with an outlet of the converter. The system can be used for detecting and analyzing the total carbon content in the recycle hydrogen, and the influence of chlorosilane on the detection and analysis device is avoided when the recycle hydrogen is detected and analyzed.

The embodiment of the specification discloses a kind of automobile carbon can escape emission pollutant detection systems.The system includes micro closed chamber, hydrogen flame ionization detector, fourier transform infrared spectrometer and controller, controller is configured in the initial moment corresponding to test instruction acquisition first test data, first test data includes the first temperature, first pressure, first hydrocarbon pollutant concentration and first methanol concentration of micro closed chamber;Controller is also configured in the first time after the first preset time length of initial moment, second test data is collected, and second test data includes the second temperature, second pressure, second hydrocarbon pollutant concentration and second methanol concentration of micro closed chamber;Controller is also configured to calculate the carbon can escape emission amount at the first time.In the embodiment, the precise quantitative detection of methanol fuel automobile pollutant emission during carbon can escape test can be realized, and the reliability of carbon can escape test is improved.

The invention discloses a gas chromatography system for detecting trace formaldehyde in gas and an operation method of the gas chromatography system. The system comprises a six-way switching valve I, a quantitative tube, a chromatographic column I, an FID detector I, a four-way switching valve I, a methane conversion furnace, a six-way switching valve II, an FID detector II, a chromatographic column II, a four-way switching valve II, a damping needle valve and an oxidation furnace. Formaldehyde in gas is oxidized into carbon dioxide under the aerobic condition by adopting a platinum catalyst, then the carbon dioxide is deoxygenized and converted into methane through a methane converter, and a signal peak is generated on an FID (Flame Ionization Detector). The system can realize direct sample injection to complete detection of trace formaldehyde in gas, is low in detection limit, does not need absorption and derivatization pretreatment, and is convenient and fast.

The invention relates to the technical field of detection and analysis, in particular to a method for determining the component content of an epoxypropane reactor sample by a gas chromatography external standard method, which comprises the following steps: carrying out physical separation pretreatment on a gas-liquid two-phase sample in a sampling steel cylinder at an outlet of an epoxypropane reactor; a gas chromatograph provided with a hydrogen flame ionization detector is adopted, under specified chromatographic conditions, a proper amount of samples are injected into a chromatographic system, a standard curve is established through an external standard method, and the content of each component is calculated. The method can rapidly and accurately determine the content of each component of the epoxypropane reactor sample, is high in accuracy and precision, and provides accurate data support for optimization of process parameters. By optimizing collaborative matching of a gas-liquid two-phase separation pretreatment process and chromatographic analysis conditions, the problems of poor separation effect, poor repeatability and the like in an epoxypropane reactor outlet sample analysis process are solved.

The utility model relates to a kind of FID-SCD series detection device, belong to gas-liquid detection field.The device is fixed with hydrogen flame ionization detector and sulfur chemiluminescence detector on the same side by support, is connected by means of stopper and current limiter.The stopper is the "convex" cylinder, metal top plate is provided with central through-hole and air hole, FID nozzle is centrally installed;Current limiter uses the quartz or ceramic insulating tube with inner diameter ≤0.35mm, length 17.5cm±0.1, one end is connected SCD gas inlet, the other end passes through through-hole and FID nozzle maintains 9-10mm interval, outer surface is coated with polytetrafluoroethylene coating.Sample is separated after chromatographic column, FID completes hydrocarbon detection, sulfur combustion product passes through current limiter and enters SCD to realize sulfur content quantitative analysis.The utility model has the advantages that: carbon sulfur data can be obtained simultaneously by one sample, reduce interference, improve analysis efficiency, applicable to petrochemical, environmental monitoring and other fields.

The invention relates to a method for detecting a residual solvent formic acid in an opinapone intermediate product. The detection method comprises the following steps: performing pre-column derivatization on formic acid, and detecting by using gas chromatography of a flame ionization detector. According to the detection method, the problem that the formic acid content of the olpinapone intermediate product is difficult to detect by ion chromatography or liquid chromatography due to extremely poor solubility of the olpinapone intermediate product in a conventional solvent can be solved, and the situation that formic acid is easily degraded from the olpinapone intermediate product under a gas-phase high-temperature condition can be prevented through structural modification. Wherein the substance for preventing formic acid from being degraded from the intermediate product of the opiapone not only can be used as a catalyst to catalyze the formic acid to react faster and more completely, but also can ensure that the formic acid is completely converted into ethyl formate. While the detection efficiency is improved, the true and reliable quality of an olpiapone intermediate product is also ensured. The method can be used for quantitatively detecting formic acid higher than 0.02% in the intermediate product of opinapone, and has the advantages of high sensitivity, strong practicability and simple and fast detection process.