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Polymer film chlorohydrocarbon individual sampler and sampling concentration measuring method

A technology of polymer membrane and measurement method, which is applied in the fields of safety technology, occupational health and environmental protection, and can solve the problem that it cannot be carried out in a sampler.

Inactive Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the sampler needs a stable and reliable molecular film to prevent the adverse effects of wind, dust, impurities and moisture on the adsorbent, and to prevent moist

Method used

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  • Polymer film chlorohydrocarbon individual sampler and sampling concentration measuring method
  • Polymer film chlorohydrocarbon individual sampler and sampling concentration measuring method
  • Polymer film chlorohydrocarbon individual sampler and sampling concentration measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A polymer membrane chlorinated hydrocarbon individual sampler, comprising a bottom box 1, a box cover 6 matched with the bottom box 1, a carbon cake 2 placed in sequence from the bottom box 1 to the box cover 6, a fixing frame 3, and a polymer membrane 4. The ferrule 5, the ferrule 5 is hollow, cooperates with the bottom box 1, the sampler is sealed as a whole, the box cover 6 has a desorption port 7, and the desorption port 7 has a removable sealing plug 9.

[0052] Carbon cake 2 is activated carbon and kaolin at a ratio of 7:1, adding water with a volume content of 40%, mixing and bonding, and drying at 90°C to make carbon cake 2 as an adsorbent. Activated carbon and kaolin are made into "charcoal cakes", also known as charcoal sheets, which are stored in a desiccator for later use.

[0053] The polymer film 4 is a silicon rubber film. The diffusion and permeation membrane on the sampling surface of the sampler is made of a polymer membrane, such as a silicone rubber f...

Embodiment 2

[0066] According to the conditions described in Example 1, the carbon cake 2 is activated carbon and kaolin at a ratio of 6:1, adding water with a volume content of 30%, mixing and bonding, and drying at 92°C to make charcoal Cake 2 acts as an adsorbent. The thickness of the silicone rubber film is 0.3 mm.

[0067] 10 workers exposed to vinyl chloride VCM in a factory in Qingdao wore polymer membrane chlorinated hydrocarbon individual samplers (such as Figure 1-4 shown). Take samples for 3 to 4 hours (the actual working hours of the workers in the factory), and record the exact time. Individual average exposure level is 288±300mg / m 3 . The average concentration of vinyl chloride in alveolar air at the end of the shift was 24.8±19.7mg / m 3 .

[0068] The time-weighted average concentration of individual exposure to vinyl chloride was positively correlated with the concentration of vinyl chloride in alveolar air at the end of shift, and the correlation coefficient was 0.74...

Embodiment 3

[0074] According to the conditions described in Example 1, charcoal cake 2 is activated carbon and kaolin in a ratio of 7:1, adding water with a volume content of 25%, mixing and bonding, and drying at 90°C to make charcoal Cake 2 acts as an adsorbent. The thickness of the silicone rubber film is 0.3 mm.

[0075] 12 individuals in a factory wore polymer membrane chlorinated hydrocarbon individual samplers (such as Figure 1-4 shown). Sampling for 4 hours (the actual working time of the factory workers), record the exact time. The individual average exposure level was 247±265mg / m3. The average concentration of vinyl chloride in alveolar air at the end of shift was 21.6±16mg / m3. The time-weighted average concentration of individual exposure to vinyl chloride was positively correlated with the concentration of vinyl chloride in alveolar air at the end of shift, and the correlation coefficient was 0.7582, which was significant (P﹤0.01).

[0076] The accuracy of the measuremen...

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Abstract

The invention discloses a polymer film chlorohydrocarbon individual sampler and a sampling concentration measuring method, belonging to the fields of safety engineering, occupational health and environmental protection. The polymer film chlorohydrocarbon individual sampler comprises a bottom box and a box cover matching with the bottom box, and further comprises a carbon cake, a fixed rack, a polymer film and a ferrule successively arranged from the bottom box to the box cover, wherein the ferrule is hollow and cooperated with the bottom box; the sampler is sealed as a whole; the box cover hasa desorption port; and the desorption port has a pullable sealing plug. A diffusion and permeation film of the invention adopts the polymer film, so the diffusion and permeation film has good chemical stability, uniform microstructure and uniform thickness, maintains stable diffusion and permeation effect, and ensures that the concentration of chlorohydrocarbon in the air and the mass of chlorohydrocarbon adsorbed on an adsorbent form a stable mathematical function; the sampler has good sealing performance, can be used as a desorption container, and is convenient for desorption measurement; and the adsorbent hardly breaks and has better adsorption effect.

Description

technical field [0001] The invention belongs to the fields of safety technology, occupational health and environmental protection, and in particular relates to a polymer membrane chlorinated hydrocarbon individual sampler and a sampling concentration measurement method. Background technique [0002] Chlorinated hydrocarbons are a general term for compounds such as chlorinated alkanes or chlorinated alkenes, such as vinyl chloride, dichloroethane, chloroform, etc., which are generally liver poisons. Vinyl chloride is recognized by the International Cancer Research Association under the World Health Organization As a carcinogen, exposure to vinyl chloride can lead to hepatic angiosarcoma. [0003] In my country's chlor-alkali industry, it is necessary to know the time-weighted average concentration (TWA or TWAC) of all workers exposed to vinyl chloride and chlorinated hydrocarbons in a working shift (8 hours), and also to understand the concentration of workers' short-term exp...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01N9/36
CPCG01N1/2214G01N9/36
Inventor 巫志鹏王晓玮王涛
Owner CHINA PETROLEUM & CHEM CORP
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