Passive sampling device for atmospheric organic pollutant

Abstract

The invention relates to a passive sampling device for atmospheric organic pollutant and belongs to the field of atmosphere environment monitoring. The passive sampling device for the atmospheric organic pollutant is aimed to provide a passive sampler featured with fast sampling speed rate, and easiness and convenience in sample processing. According to the technical scheme, the sampling device comprises a sampling material holding bracket, a semi-permeable membrane and sampling material; the sampling material holding bracket is a hollow column body, and a connecting device is arranged at each lateral surface of the hollow column body to form an interlayer between the two lateral surfaces of the hollow column body; the semi-permeable membrane is placed in the interlayer of the sampling material holding bracket; the sampling material is placed in the semi-permeable membrane, and a semi-permeable membrane is arranged between the sampling material and the sampling material holding bracket.

Description

Technical field [0001] The invention relates to a passive sampling device for atmospheric organic pollutants, belonging to the field of atmospheric environment monitoring. Background technique [0002] With the rapid development of urbanization and industrialization in my country in recent years, the problem of urban air environmental pollution has become more and more serious, bringing many health and safety hazards and threats to urban residents. With the continuous development of many advanced analysis methods, the level of analysis and testing of environmental samples has been greatly improved. However, the collection of environmental atmospheric samples is still limited by many conditions. Currently, the commonly used atmospheric active (such as large-volume air samplers) sampling equipment is large in size and needs to be driven by electric power, making it difficult to conduct large-scale sampling in the field. In order to solve this problem, some scholars put forward the...

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Problems solved by technology

[0004] CN201210172065.5 discloses a passive sampling device for persistent organic pollutants in the atmosphere. The method uses alkylated diatomite coated with silicone oil as the sampling medium, but there is only one layer of low-density polyethylene film between the sampling port and the atmosphere. , the wind speed has a great influence on the sampling results, and the low-density polyethylene film is easy to break, and it is difficult to operate in heavy rain and windy weather

CN201210474571.X discloses a passive sampling device for multi-component atmospheric organic pollutants, which supports and protects the sampling sieve drum through the stacking of multi-layer baffles, but the higher wind speed will also have a greater impact on the sampling results, and due to multiple Due to the weight factor of the baffle itself, the size of the entire sampling device should not be too large, and the sampling rate is also limited.

CN200910077064.0 discloses a passive sampling device for persistent organic pollutants. The method adopts the design of an inner cover and an outer cover for sampling, and two collection materials are respectively placed on the upper and lower sides of the inner cover to realize the simultaneous collection of gaseous pollutants and particulate pollutants. CN201310325898.5 discloses a passive sampling device for persistent organic pollutants, the contact area between the gaseous pollutants and the sampling medium is only the upper bottom surface of the cylindrical sampling device, the equivalent sampling volume is small, and the sampling rate is limited

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