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Method for detecting VOCs in air

A detection method, air technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that the detection results are affected by other factors, the detection process is cumbersome, and the detection is inaccurate, so as to achieve comprehensive and accurate VOCs components and concentrations, The detection method is simple and the repeatability is good

Active Publication Date: 2020-11-24
SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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Problems solved by technology

Existing methods for the detection of volatile organic compounds in the air mainly include gas chromatography, mass spectrometry, and high-performance liquid chromatography; The result is affected by other factors, and the detection is not accurate
[0003] Through the above analysis, the problems and defects of the existing technology are: the existing detection method has high requirements on the sample, and the sample needs to be pretreated, the detection process is cumbersome, and has hysteresis, and the detection result is affected by other factors. precise

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  • Method for detecting VOCs in air
  • Method for detecting VOCs in air
  • Method for detecting VOCs in air

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] Aiming at the problems existing in the prior art, the present invention provides a method for detecting VOCs in the air. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] Such as figure 1 As shown, the VOCs detection method in the air that the embodiment of the present invention provides includes:

[0036] S101. Determine the location of the sampling point, collect an air sample, and use a pump to pass the air sample through the adsorbent to collect VOCs.

[0037] S102, enriching the collected VOCs through the VOCs adsorption treatment device in the air....

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Abstract

The invention belongs to the technical field of volatile organic compound detection, and discloses a method for detecting VOCs in air. The method comprises the following steps: determining the position of a sampling point, collecting an air sample, and collecting the VOCs from the air sample through an adsorbent by using a pump; subjecting the collected VOCs to enrichment treatment through an adsorption treatment device for the VOCs in the air; analyzing the components and the concentration of the VOCs in the air of the enriched VOCs sample by adopting a GC-FID / MS coupling technology; analyzing the content of formaldehyde in the indoor air through an acetylacetone spectrophotometric method; preparing a standard sample solution of various volatile compounds, drawing a standard curve, and analyzing the enriched VOCs sample to obtain a corresponding detection result. The detection method is high in accuracy, good in repeatability, low in detection limit, free of sample treatment, low in requirement for collected air samples, simple, capable of avoiding repeated sampling and simplifying detection steps and high in sensitivity.

Description

technical field [0001] The invention belongs to the technical field of volatile organic compound detection, in particular to a method for detecting VOCs in air. Background technique [0002] At present, volatile organic compounds ((volatile organic compounds, VOCs) are the precursors of photochemical smog, ozone and secondary organic aerosols, which have a serious impact on human health and the natural ecological environment. The detection of volatile organic compounds in the air is mainly There are gas chromatography, mass spectrometry, and high-performance liquid chromatography; the above methods have high requirements on samples and require pretreatment of samples. The detection process is cumbersome and has hysteresis. At the same time, the detection results are affected by other factors and the detection is inaccurate. [0003] Through the above analysis, the problems and defects of the existing technology are: the existing detection method has high requirements on the ...

Claims

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Application Information

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IPC IPC(8): G01N30/08G01N30/88
CPCG01N30/08G01N30/88
Inventor 刘艳霖朱睿幸嘉瑜
Owner SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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