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Method for detecting odor substances of whole automobile

An odor and substance technology, applied in the field of automobile volatile odor detection, can solve the problems of insufficient detection strength, heavy odor, non-existence, etc., and achieve the effect of avoiding omissions

Active Publication Date: 2020-04-24
上海微谱检测科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional cars need to pass the VOC test before leaving the factory, but in the actual use process, even if the purchased car has passed the test of the relevant car interior decoration There will still be related odors in the test standard
This is because there are many gaseous substances that are non-toxic and harmless to the human body, and often have a strong odor, and these gaseous substances do not exist in the detection standards, so they are easily ignored in the conventional detection standards
In addition, there will be other components with relatively large odor but less content at room temperature or high temperature, such as dimethyl heptane, cyclohexanone, propylene glycol diacetate, decanol, etc., and these trace amounts are detected in existing detection methods Insufficient detection of odor substances to be detected

Method used

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  • Method for detecting odor substances of whole automobile
  • Method for detecting odor substances of whole automobile
  • Method for detecting odor substances of whole automobile

Examples

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preparation example Construction

[0043] Described hyperbranched polyurethane preparation method comprises the steps:

[0044] (1) In the container, add 0.05mol of 3-amino-N-(2-mercaptoethyl) propionamide and 0.1mol of hydroxyethylethylenediamine under the condition of feeding nitrogen, and stir under an ice-water bath;

[0045] (2) Add dropwise a methanol solution of 0.075mol 2,3-epoxypropyl acrylate and 0.075mol methyl acrylate to the system of the first step, and stir at room temperature for 2 to 4 hours, then evaporate and concentrate to obtain intermediate body;

[0046] (3) Add 0.25 g of p-toluenesulfonic acid to the intermediate in the second step, and the system is heated up to 120° C., reacted under stirring for 3.5 hours, evaporated and concentrated to obtain the hyperbranched polyurethane.

[0047] In some embodiments, the weight ratio of the cyclodextrin to the hyperbranched polyurethane is (0.6-1.2):1.

[0048] In the present invention, due to the difference between the interaction force between...

Embodiment 1

[0071] Example 1 Provided is a method for detecting odorous substances in a vehicle, comprising the steps of:

[0072] (1) The adsorbent is placed in a container containing vehicle odor substances to adsorb the odor substances;

[0073] (2) Put the adsorbent adsorbed with the odor substance in the headspace bottle, desorb the odor substance therein, and pass the odor substance into the GC-O / MS;

[0074] (3) GC-O / MS separation and qualitative and quantitative detection of components and contents of vehicle odor substances;

[0075] The adsorbent is a porous organosilicon material prepared by using a mixture of cyclodextrin and hyperbranched polyurethane as a template and polyorganosiloxane as a raw material through a sol-gel method.

[0076] Among them, the GC-O / MS separation and qualitative and quantitative detection process includes the following steps:

[0077] 1. Add the odorous substances in Table 1 into the headspace bottle, shake to mix, push the SPME handle to penetrat...

Embodiment 2

[0095] Example 2 Provided is a method for detecting odorous substances in a vehicle, comprising the steps of:

[0096] (1) The adsorbent is placed in a container containing vehicle odor substances to adsorb the odor substances;

[0097] (2) Put the adsorbent adsorbed with the odor substance in the headspace bottle, desorb the odor substance therein, and pass the odor substance into the GC-O / MS;

[0098] (3) GC-O / MS separation and qualitative and quantitative detection of components and contents of vehicle odor substances;

[0099] The difference from Example 1 is that the adsorbent is a porous organosilicon material prepared by a sol-gel method using a mixture of cyclodextrin, hyperbranched polyurethane and a cucurbit compound as a template, and polyorganosiloxane as a raw material.

[0100] The preparation method of described adsorbent comprises the steps:

[0101] (1) Blend 0.2 mol of tetramethoxysilane and 0.2 mol of organosilane containing styrene structure, and add 20...

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Abstract

The invention relates to the technical field of automobile volatile odor detection, in particular to a method for detecting odor substances of a whole automobile. The method comprises the following steps: (1) putting an adsorbent into a container containing vehicle odor substances, and adsorbing the odor substances; (2) putting the adsorbent adsorbing the odorous substances into a headspace bottle, desorbing the odor substances in the headspace bottle, and introducing the odor substances into GC-O / MS; and (3) separating through GC-O / MS and qualitatively and quantitatively detecting the components and content of the odor substances in the whole automobile. The method can accurately detect the odor substance components such as benzene, methylbenzene, dimethylbenzene, ethylbenzene, styrene, formaldehyde, acetaldehyde and acrolein in the conventional VOC content standard of the automotive trim material and can also accurately and quantitatively detect certain trace odor components such asdimethyl heptane, cyclohexanone, propylene glycol diacetate and decanol so as to avoid missing of detection of the odor substance components in the whole automobile.

Description

technical field [0001] The invention relates to the technical field of automobile volatile odor detection, in particular to a method for detecting odor substances in a whole vehicle. Background technique [0002] The volatile organic compounds emitted by cars are very harmful to people. When the VOC in the car reaches a certain concentration, people will feel headache, nausea, etc. in a short time, and convulsions will occur in severe cases, and will damage the human liver, kidneys, Brain and nervous system. VOC is the English abbreviation of volatile organic compounds (volatile organic compounds). VOC in the general sense is command volatile organic compounds; but the definition in the sense of environmental protection refers to a type of active volatile organic compounds, that is, the type of volatile organic compounds that will cause harm. The VOCs of automotive interior materials mainly include benzene, toluene, xylene, ethylbenzene, styrene, formaldehyde, acetaldehyde...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N1/22B01J20/26B01J20/28B01J20/30
CPCG01N30/02G01N30/06G01N1/2214B01J20/268B01J20/28054
Inventor 袁青黄军聘冯亮吴杰贾梦虹
Owner 上海微谱检测科技集团股份有限公司
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