CN114894932B - Method for detecting trace odor components in textile fabric for automobile - Google Patents

Method for detecting trace odor components in textile fabric for automobile Download PDF

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CN114894932B
CN114894932B CN202210494427.6A CN202210494427A CN114894932B CN 114894932 B CN114894932 B CN 114894932B CN 202210494427 A CN202210494427 A CN 202210494427A CN 114894932 B CN114894932 B CN 114894932B
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textile fabric
trace
detecting
odor components
mass spectrometry
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CN114894932A (en
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王鹏
肖冬民
路明
周红兵
徐珍珍
张建格
林良
陈立华
韦玉辉
王震
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Anhui Polytechnic University
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Anhui Polytechnic University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/04—Preparation or injection of sample to be analysed
    • G01N30/06—Preparation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/04—Preparation or injection of sample to be analysed
    • G01N30/06—Preparation
    • G01N30/08—Preparation using an enricher
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/62—Detectors specially adapted therefor
    • G01N30/72—Mass spectrometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/86—Signal analysis
    • G01N30/8624—Detection of slopes or peaks; baseline correction
    • G01N30/8631—Peaks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/04—Preparation or injection of sample to be analysed
    • G01N30/06—Preparation
    • G01N2030/062—Preparation extracting sample from raw material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
    • G01N2030/884—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses a method for detecting trace odor gas components in an automotive textile fabric, which relates to the technical field of trace gas component detection and comprises the following steps of: using CO 2 Constructing a polar extraction environment, increasing the pressure of the extraction environment to 1-1.6 MPa, enriching trace gas by using an extraction head, detecting and analyzing by using a gas chromatography-mass spectrometry method, detecting at least three times by using the gas chromatography-mass spectrometry method, and accumulating and superposing detection signals. The method can more accurately measure trace odor organic matters in the textile fabric by effectively adsorbing and desorbing trace organic matters and accumulating the peak intensity of the test signal.

Description

Method for detecting trace odor components in textile fabric for automobile
Technical Field
The invention relates to the technical field of trace gas component detection, in particular to a method for detecting trace peculiar smell gas components in textile fabrics for automobiles.
Background
With the continuous improvement of environmental awareness and self-protection awareness of people, the attention is paid to the environmental air quality in the vehicle, which is directly related to physical health. Various adhesive materials, seat cushion fabrics and the like used for automotive interiors can slowly and permanently release trace benzene series, halogenated hydrocarbon, aldehyde ketone and other volatile peculiar smell organic matters, particularly the temperature in the automobile is higher, the environment is more complex, under the condition, the requirements of people on the concentration and main components of peculiar smell in the automotive textile fabric are more strict, and the body health of people is seriously endangered. How to quickly and accurately detect trace odor components in the textile fabric for the automobile relates to the control and reduction of the odor in the automobile interior environment by automobile manufacturers, can also provide technical support for market supervision departments, and has great practical significance.
At present, the odor evaluation of the textile fabric for the automotive interior is mainly carried out by an artificial olfactory method, and is greatly influenced by subjective factors and poor in stability. In addition, researchers carry out qualitative and quantitative analysis on peculiar smell compounds of textile fabrics through a gas chromatography-mass spectrometry combined method, and although the method is relatively objective, the content and the concentration of volatile peculiar smell organic matters in a plurality of types of peculiar smell are very low, trace organic matters in the peculiar smell are difficult to detect by the existing method, and are often ignored by people, so that the body health is seriously damaged. In addition, researchers use a liquid phase extraction method to extract and analyze organic matters in the fabric, and as the purity of the organic or inorganic extract liquid used in the extraction method is generally less than 100%, the system contains a very small amount of other substances, and the required volume of the extract liquid is large, so that the volatile peculiar smell organic matters in the fabric extracted into the extract liquid are infinitely diluted, and meanwhile, the environment is polluted; these factors create great difficulty in accurately detecting trace amounts of volatile off-flavor organics in the fabric. It is worth to say that, the existing method for measuring the peculiar smell compound components of the textile fabric by using the gas chromatograph-mass spectrometer detects the volatile peculiar smell compound only once, the collected signals are easily covered by the miscellaneous peaks, and are also easily submerged by the stronger signal peaks, so that part of trace organic matters are omitted and ignored, and the detection is inaccurate.
Therefore, how to detect trace odor components in textile fabrics and establish a sensitive, accurate, efficient and objective detection method become the current problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a sensitive, accurate, efficient and objective method for detecting trace odor components in an automotive textile fabric aiming at the defects of the prior art.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a method for detecting trace odor components in an automotive textile fabric, which comprises the following steps of: using CO 2 The polar extraction environment is constructed, the pressure of the extraction environment is increased to 1 MPa-1.6 MPa, trace volatile peculiar smell organic matters in the fabric can be completely extracted, trace gases are enriched by using an extraction head, then detection and analysis are carried out by using a gas chromatography-mass spectrometry method, at least three times of detection are carried out by using the gas chromatography-mass spectrometry method, and detection signals are accumulated and overlapped.
In the detection method of the present invention, CO is first constructed 2 Polar extraction environments, these CO 2 Molecules can enter the fiber gaps, volatile peculiar smell organic matters adsorbed in the fiber gaps are almost all polar gases, and trace polar gases can be dissolved in CO 2 In a gas-built extraction system, thereby extracting volatile odor organic compounds adsorbed in fiber voids into the closed environment of the reactor, and in addition, CO is added into the extraction environment by changing 2 The air pressure in the extraction system can be effectively regulated by the content of the gas, and the effective extraction of volatile peculiar smell organic matters adsorbed in the fiber gaps can be increased; on the other hand, after the extraction head in the extraction system reaches adsorption balance, gas chromatography mass spectrometry detection analysis is carried out on the extraction head, the volatile peculiar smell organic matters adsorbed in the extraction head can be completely released through the 3 desorption processes, then detection signals are collected for 3 times, the signal peak intensity collected for 3 times is accumulated, and the uncorruptible weak peaks of the original trace organic matters are accumulated to be stronger peaks, so that the detection is more accurateAnd (5) measuring and analyzing trace peculiar smell gas in the textile fabric.
Further, the application temperature is raised to 50 ℃ at a heating rate of 5 ℃/min, and is kept for 10-20 min, and then is raised to 80 ℃ at a heating rate of 2 ℃/min, and is kept for 10-20 min.
Further, the extraction head is 30 microns of divinylbenzene-carbon molecular sieve-polydimethylsiloxane, 65 microns of divinylbenzene-polydimethylsiloxane, 75 microns of carbon molecular sieve-polydimethylsiloxane, or 100 microns of polydimethylsiloxane.
Further, the ambient temperature is reduced to 20-35 ℃ at a cooling rate of 3-5 ℃/min during the enrichment process.
Further, after enrichment is finished, the extraction head is taken out, and desorption is carried out for 2 to 4 minutes at the temperature of 230 to 260 ℃.
Further, the extraction head is repeatedly desorbed for 1 to 3 times, and analysis is continued by using a gas chromatography-mass spectrometry method.
Further, the parameters of the gas chromatography-mass spectrometry method are as follows: the temperature is kept for 10min at 50 ℃, and then the temperature is raised to 250 ℃ at a temperature rising rate of 10 ℃/min; the chromatographic column is Rtx-5ms (30 m x 0.25 um); the carrier gas was high purity helium (99.9999%), column flow: 1.5mL/min; the sample injection mode is split sample injection, and the split ratio is 10:1, a step of; EI source with voltage of 70eV and temperature of 200 ℃; the temperature of the sample inlet is 250 ℃; the temperature of the four-stage rod is 150 ℃, and the scanning mode is as follows: q3 Scan m/z is 25.00-250.00.
The invention discloses the following technical effects:
the method extracts trace volatile peculiar smell organic matters which are difficult to detect in the textile fabric through a high-pressure gas-phase extraction method for detection and analysis; the volatile peculiar smell organic matters are almost all polar gases, and CO is used 2 The polar extraction environment is constructed, the pressure of the extraction environment is increased, trace volatile peculiar smell organic matters in the fabric can be completely extracted, then the detection analysis is carried out by using a gas chromatography-mass spectrometer after the trace volatile peculiar smell organic matters are adsorbed by an extraction head, and the gas chromatography-mass spectrometer is used for multiple times through the process of multiple adsorption-desorptionThe detector is used for detecting the trace organic matters, and multiple detection signals are accumulated and overlapped, so that the peak intensity of the trace organic matters is increased, the analysis of the trace organic matters is greatly facilitated, and trace peculiar smell gases in the textile fabric are detected and analyzed more accurately. Wherein CO is 2 The gas is used as a solvent, is nontoxic and harmless, and has no other impurities introduced into the test system. In addition, trace organic matters in the textile fabric can be more accurately tested through effective adsorption-desorption of trace organic matters and accumulation of the peak intensity of a test signal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a total ion flow diagram of the odor emitting main component of the automotive interior fabric of example 1, wherein 1-cyclopentanone, 2-butyl acrylate, 3-1, 4-dioxaspiro [4.4] -nonane, 4-phenol, dimethyl 5-succinate, 6-nonanal, dimethyl 7-glutarate, 8-decanal, dimethyl 9-adipate, 10-lauryl alcohol/dodecanol, 11-2, 6-di-t-butyl-p-cresol, 12-bis (dimethylaminoethyl) ether;
FIG. 2 is a total ion flow diagram of the odor emitting main component of the automotive interior fabric of example 2, wherein 1-nonanal, 2-bis (dimethylaminoethyl) ether;
FIG. 3 is a total ion flow diagram of the odor emitting main component of the automotive interior fabric of example 3, wherein 1-cyclopentanone, 2-butyl acrylate, 3-1, 4-dioxaspiro [4.4] -nonane, 4-phenol, dimethyl 5-succinate, 6-nonanal, dimethyl 7-glutarate, 8-decanal, dimethyl 9-adipate, 10-lauryl alcohol/dodecanol, 11-2, 6-di-t-butyl-p-cresol, 12-bis (dimethylaminoethyl) ether;
FIG. 4 is a total ion flow diagram of a volatile odor organic test in a liquid phase extracted textile fabric of comparative example 1;
FIG. 5 is a total ion flow diagram of a test for volatile odor organic compounds in a heat extracted textile fabric of comparative example 2;
FIG. 6 is a total ion flow chart of the main components of the automobile interior material of comparative example 3, wherein 1-cyclopentanone, 2-dimethyl succinate, 3-dimethyl glutarate, 4-dimethyl adipate, 5-lauryl alcohol/dodecanol, 6-2, 6-di-t-butyl-p-cresol.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
Example 1
0.1g of textile fabric for automobile interior trim was placed in a reactor, and vacuum was applied, followed by charging CO into the reactor 2 Gas such that the reactor is filled with CO 2 And (3) gas, so that the pressure in the reactor reaches 1.3MPa, and sealing. The reactor was then warmed to 50 ℃ at a ramp rate of 5 ℃/min and incubated for 15 minutes, and then warmed to 80 ℃ at a ramp rate of 2 ℃/min for 20 minutes, allowing trace gases in the fabric to fully volatilize into the reactor. And then the divinylbenzene-carbon molecular sieve-polydimethylsiloxane with the extraction head of 30 micrometers in the reactor is used for enriching trace gases in the reactor, the temperature in the reactor is reduced to 30 ℃ at the cooling rate of 3 ℃/min in the enrichment process, the extraction head is taken out and then desorbed for 4 minutes at 240 ℃, and then the analysis is carried out by adopting a gas chromatography-mass spectrometry method. Repeatedly desorbing the extraction head for 3 times, continuously analyzing by using a gas chromatography-mass spectrometry method, collecting gas chromatography-mass spectrometry signals for 3 times, accumulating the signal intensity of each substance, and qualitatively determining trace odor components in the textile fabric according to each retention time in the spectrum after the final accumulated signal intensity. The gas chromatography-mass spectrometry method parameters are as follows: the temperature is kept for 10min at 50 ℃, and then the temperature is raised to 250 ℃ at a temperature rising rate of 10 ℃/min; the chromatographic column is Rtx-5ms (30 m x 0.25 um); the carrier gas was high purity helium (99.9999%), column flow: 1.5mL/min; the sample injection mode is split sample injection, and the split ratio is 10:1, a step of; EI source with voltage of 70eV and temperature of 200 ℃; the temperature of the sample inlet is 250 ℃; the temperature of the four-stage rod is 150 ℃, and the scanning mode is as follows: q3 Scan m/z is 25.00-250.00.
The total ion flow diagram of the main components of the odor emitted by the automotive interior fabric is shown in figure 1, and 12 main components of the odor emitted by the automotive interior fabric, namely cyclopentanone, butyl acrylate, 1, 4-dioxaspiro [4.4] -nonane, phenol, dimethyl succinate, nonanal, dimethyl glutarate, decanal, dimethyl adipate, lauryl alcohol/dodecyl alcohol, 2, 6-di-tert-butyl-p-cresol and bis (dimethylaminoethyl) ether can be accurately analyzed by the method.
Example 2
The procedure is as in example 1, except that the addition of CO is modified 2 The amount of gas was such that the pressure in the reactor was 1.0MPa, and the result was shown in FIG. 2. As can be seen from FIG. 2, the main components of the odor emitted from the automotive interior fabric, namely 1-nonanal and 2-bis (dimethylaminoethyl) ether, were 2, respectively, which were analyzed by the method of comparative example 3.
Example 3
The procedure is as in example 1, except that the addition of CO is modified 2 The amount of gas was such that the pressure in the reactor was 1.6MPa, and the result was shown in FIG. 3. As can be seen from FIG. 3, in accordance with the results of example 1, 12 kinds of 1-cyclopentanone, 2-butyl acrylate and 3-1, 4-dioxaspiro [4.4] as the main components of the odor emitted from the automobile interior material were analyzed by the method of example 3]Nonane, 4-phenol, dimethyl 5-succinate, 6-nonanal, dimethyl 7-glutarate, 8-decanal, dimethyl 9-adipate, 10-lauryl alcohol/dodecanol, 11-2, 6-di-tert-butyl-p-cresol, 12-bis (dimethylaminoethyl) ether.
Comparative example 1
Placing 0.1g of textile fabric for automobile interior decoration in 30 ml of ethanol solution with the mass concentration of 99.7%, sealing, keeping the temperature for 2 hours under the magnetic stirring with the rotating speed of 300 revolutions per minute and the temperature of 50 ℃, and then analyzing the ethanol extract by using a gas chromatography-mass spectrometry combination method, wherein the parameters of the gas chromatography-mass spectrometry combination method are as follows: the temperature is kept for 10min at 50 ℃, and then the temperature is raised to 250 ℃ at a temperature rising rate of 10 ℃/min; the chromatographic column is Rtx-5ms (30 m x 0.25 um); the carrier gas was high purity helium (99.9999%), column flow: 1.5mL/min; the sample injection mode is split sample injection, and the split ratio is 10:1, a step of; EI source with voltage of 70eV and temperature of 200 ℃; the temperature of the sample inlet is 250 ℃; the temperature of the four-stage rod is 150 ℃, and the scanning mode is as follows: q3 Scan m/z 25.00-250.00. The total ion flow diagram of the volatile odor organic compound test in the liquid phase extracted textile fabric is shown in fig. 4. As a result, it was found that no organic matter was detected in the chromatogram of fig. 4, because more extraction liquid was required in the process of extracting organic matter in the textile fabric, which resulted in infinite dilution of volatile off-flavor organic matter in the fabric extracted into the extraction liquid, exceeding the detection limit of the test equipment and system.
Comparative example 2
0.1g of textile fabric for automobile interior decoration is placed in a closed reactor, and the pressure in the reactor is kept at normal pressure, and the reactor is sealed. The reactor was then warmed to 50 ℃ at a ramp rate of 5 ℃/min and incubated for 15 minutes, and then warmed to 80 ℃ at a ramp rate of 2 ℃/min for 20 minutes, allowing trace gases in the fabric to fully volatilize into the reactor. The air in the reactor was then analyzed using a gas chromatography-mass spectrometry method with the following parameters: the temperature is kept for 10min at 50 ℃, and then the temperature is raised to 250 ℃ at a temperature rising rate of 10 ℃/min; the chromatographic column is Rtx-5ms (30 m x 0.25 um); the carrier gas was high purity helium (99.9999%), column flow: 1.5mL/min; the sample injection mode is split sample injection, and the split ratio is 10:1, a step of; EI source with voltage of 70eV and temperature of 200 ℃; the temperature of the sample inlet is 250 ℃; the temperature of the four-stage rod is 150 ℃, and the scanning mode is as follows: q3 Scan m/z is 25.00-250.00. The total ion flow diagram of the test for volatile odor organic compounds in the heated extracted textile fabric is shown in fig. 5.
The signal peaks belonging to the organic matter cannot be found from fig. 5. This indicates that trace amounts of organics in the textile fabric cannot be efficiently extracted and analyzed using conventional heating methods.
As a result of comparing the test results of examples 1 to 3 and comparative example 2, it was found that CO was added 2 After the gas is generated, the peculiar smell volatile gas adsorbed in the automotive interior fabric can be effectively extracted into a reaction system, and the components of the gas can be detected; furthermore, by changing CO 2 The pressure in the reactor is changed by the added amount of the gas, so that various peculiar smell volatile gases can be extracted into the reaction system and can be detected more accurately.
Comparative example 3
The procedure is the same as in example 1, except that the number of times of acquisition of the gas chromatography-mass spectrometry signal is changed to 1, and the result is shown in FIG. 6. As can be seen from FIG. 6, when only 1 gas chromatography-mass spectrometry signal was collected, 6 kinds of main components, namely 1-cyclopentanone, 2-dimethyl succinate, 3-dimethyl glutarate, 4-dimethyl adipate, 5-lauryl alcohol/dodecanol and 6-2, 6-di-tert-butyl-p-cresol, which are the odor emitted from the automotive interior fabric, could be analyzed by the method of comparative example 3.
According to the results of the embodiment 1 and the comparative example 3, the gas chromatography-mass spectrum signal acquisition times are increased, and the intensity of the superposed detection signals can be accumulated, so that the peak intensity of trace organic matters is increased, the analysis of the trace organic matters is greatly facilitated, and the trace peculiar smell gas in the textile fabric is detected and analyzed more accurately.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims (7)

1. The method for detecting trace odor components in the textile fabric for the automobile is characterized by comprising the following steps of: using CO 2 Constructing a polar extraction environment, increasing the pressure of the extraction environment to 1-1.6 MPa, enriching trace gas by using an extraction head, detecting and analyzing by using a gas chromatography-mass spectrometry method, detecting at least three times by using the gas chromatography-mass spectrometry method, and accumulating and superposing detection signals.
2. The method for detecting trace amounts of odor components in a textile fabric for automobiles according to claim 1, wherein the application temperature is raised to 50 ℃ at a temperature raising rate of 5 ℃/min, and is kept for 10 to 20 minutes, and then is raised to 80 ℃ at a temperature raising rate of 2 ℃/min, and is kept for 10 to 20 minutes.
3. The method for detecting trace amounts of odor components in a textile fabric for an automobile according to claim 1, wherein the extraction head is 30 micrometers of divinylbenzene-carbon molecular sieve-polydimethylsiloxane, 65 micrometers of divinylbenzene-polydimethylsiloxane, 75 micrometers of carbon molecular sieve-polydimethylsiloxane or 100 micrometers of polydimethylsiloxane.
4. The method for detecting trace amounts of odor components in a textile fabric for automobiles according to claim 1, wherein the ambient temperature is reduced to 20-35 ℃ at a temperature reduction rate of 3-5 ℃/min during the enrichment process.
5. The method for detecting trace amounts of odor components in a textile fabric for automobiles according to claim 1, wherein after enrichment is completed, the extraction head is taken out and desorbed for 2 to 4 minutes at 230 to 260 ℃.
6. The method for detecting trace amounts of odor components in a textile fabric for automobiles according to claim 5, wherein the extraction head is repeatedly desorbed 1 to 3 times and analysis is continued by using a gas chromatography-mass spectrometry method.
7. The method for detecting trace amounts of odor components in a textile fabric for automobiles according to claim 1, wherein the scanning mode of the mass spectrometry is Q3 Scan m/z 25.00-250.00, and the voltage is 70eV.
CN202210494427.6A 2022-05-07 2022-05-07 Method for detecting trace odor components in textile fabric for automobile Active CN114894932B (en)

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