Passive adsorbing and sampling device for detecting concentration of volatile contaminant in indoor air

Abstract

The invention relates to a passive adsorbing and sampling device for detecting the concentration of a volatile contaminant in indoor air, belonging to the field of indoor environment detection. The device comprises a cylindrical adsorbent, a base, an outer cover and a rubber washer, wherein the cylindrical adsorbent is arranged on the base; the outer cover is sheathed outside the cylindrical adsorbent and is sealed with the base through the rubber washer. The device adopts a passive adsorbing and sampling mode, does not need additional power, realizes cylindrical radial adsorption and sampling, has large adsorption area and saves material utilization amount; the target contaminant is various organic volatile contaminants in indoors, and is placed in a thermo desorption tube after sampling; and the device directly uses a gas chromatography (GC) or a gas chromatography-mass spectrometry (GC-MS) with a thermal desorption (TD) or automatic thermal desorption (ATD) function to analyze the concentration of the sample, is small, exquisite and portable, can be placed in indoor to measure the average concentration of the contaminants within a certain time, and can be worn by people to measure the average exposure amount in a certain time, thus greatly reducing detection cost.

Description

technical field [0001] The invention belongs to the field of indoor environment detection, in particular to a passive adsorption sampling device used for indoor volatile chemical pollutant concentration detection. Background technique [0002] Indoor air quality significantly affects people's comfort, health and work efficiency, and has attracted more and more attention. The high concentration of volatile organic compounds (VOCs) released by indoor objects and decoration materials is one of the main reasons for poor indoor air quality. In order to ensure a safe and comfortable indoor environment, the detection of indoor chemical pollutants is very important. Scientific detection methods can help indoor users understand whether the daily environment meets safety standards, and take timely and effective measures to control and rectify unqualified indoor environments, avoid environmental pollution risks, and meet people's health and comfort requirements. However, the current ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing indoor volatile organic compound pollutant samplers, and provide a passive adsorption sampling device for indoor air volatile pollutant concentration detection. The device is small, light, simple and reliable, and can Combined with thermal desorption and GC, GC-MS for detection, the cost of manufacturing and testing is not high, and it can realize the function of collecting multiple polluted gases in one tube

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