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Test device for sampling efficiency of volatile organic compounds in air

A technology of volatile organic compounds and sampling efficiency, which is used in measurement devices, instruments, scientific instruments, etc., can solve problems such as poor stability, unscientific nature, and inability to match meteorological parameters, and achieve the effect of simple structure and wide application range.

Active Publication Date: 2015-04-15
JIANGSU ENVIRONMENTAL MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The traditional method of sampling efficiency testing is usually solved in two ways. One is sampling in large plastic bags or fume hoods. The volume of gas collected in this way cannot be simulated with the actual situation, and the meteorological parameters cannot be matched. The stability is poor and it is not scientific.

Method used

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  • Test device for sampling efficiency of volatile organic compounds in air
  • Test device for sampling efficiency of volatile organic compounds in air
  • Test device for sampling efficiency of volatile organic compounds in air

Examples

Experimental program
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Embodiment 1

[0049] The most common and most analyzed volatile organic compounds in the air are benzene series, which are generally referred to as benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene, cumene, and styrene. It is the most common compound in the atmospheric environment and many pollution source gases, and has certain harmful effects on human health. Among them, benzene was recognized by the World Health Organization (WHO) as a strong carcinogen in 1993, which can cause leukemia and aplastic anemia. recognized by the medical community. They are therefore important pollutants of the environment. Taking the sampling and testing efficiency of benzene series in the air as an example, the sampling efficiency testing device of the present invention is used for testing.

[0050] The sampling efficiency testing device for volatile organic compounds in the air of the present invention comprises a steel cylinder I1 for storing diluted gas, six steel cylinders II2 for storing st...

Embodiment 2

[0069] The difference from Example 1 is that in Example 2, the flow rate of the flow meter 15 is designed to be 3000 mL / min, and the collection time is 10 minutes.

Embodiment 3

[0071] The difference from Example 1 is that in Example 3, the flow rate of the flow meter 15 is designed to be 500 mL / min, and the collection takes 200 minutes.

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Abstract

The invention belongs to the field of environmental monitoring and particularly relates to a test device for sampling efficiency of volatile organic compounds in air. The test device comprises a steel cylinder I, a plurality of steel cylinders II, a temperature and humidity control device, a dynamic uniform-mixing device and a plurality of sampling adsorption devices, wherein the steel cylinder I and the steel cylinders II are connected in parallel with one end of the temperature and humidity control device respectively; the other end of the temperature and humidity control device is connected in series with one end of the dynamic uniform-mixing device; the other end of the dynamic uniform-mixing device is connected in parallel with the sampling adsorption devices. The test device is simple in structure and does not need an air pump; the temperature and humidity of gas are controlled within a certain range or below a certain specific temperature or humidity through the temperature and humidity control device, and thus test results are accurate; the test device is wide in application range, can test the gas sampling efficiency of various sampling manners, also can accurately calculate the adsorption efficiency of adsorbents, and helps to choose appropriate adsorbents and sampling methods.

Description

technical field technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a sampling efficiency testing device for volatile organic compounds in the air. Background technique [0002] At present, there are standard analysis methods for the determination of volatile organic compounds in the air and exhaust gas of the environmental protection industry. much larger than the analytical error. The reason why these standards do not pay attention to the sampling method is not because they do not know the importance of the sampling method, but because there is no suitable sampling test efficiency device to simulate the sampling efficiency problem during on-site sampling, so these standards ignore the sampling method. This is also an important reason why a large part of the environmental protection industry has few and slow introduction of standards for volatile organic compounds in the air and exhaust gas. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
Inventor 赵永刚章勇张蓓蓓孙玉霞
Owner JIANGSU ENVIRONMENTAL MONITORING CENT
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