Sampling device and concentration determination method for semi-volatile organic matter in ambient air

A semi-volatile, ambient air technology, applied in the field of indoor environmental detection, can solve the problems of gas phase and particle phase SVOC errors, and achieve the effect of stable flow and accurate measurement

Active Publication Date: 2018-12-25
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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Problems solved by technology

Due to the different ways of gas phase and particle phase SVOC entering the human body, using this sampling method to obtain gas phase and particle phase SVOC concentrations will produce certain errors when it is necessary to understand and estimate indoor SVOC exposure levels

Method used

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  • Sampling device and concentration determination method for semi-volatile organic matter in ambient air
  • Sampling device and concentration determination method for semi-volatile organic matter in ambient air
  • Sampling device and concentration determination method for semi-volatile organic matter in ambient air

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Embodiment Construction

[0042] The present invention is described in further detail below in conjunction with accompanying drawing:

[0043] Such as figure 1 As shown, a sampling device for semi-volatile organic compounds in ambient air is characterized in that the sampling device is composed of a top cover 1, an SVOC sample collection device, a flow meter 8, a flow regulating device 9, and an air extraction power 10. The top cover 1 is the same shape as the end surface of the shell 2, and the edge bends downward beyond the entrance of the shell 2, which can block the entrance of the shell 2 in the radial direction, and can take in air from around to reduce the influence of wind force on sampling, and also has the function of preventing Rain and snow, anti-dust effect. The SVOC sample collection device is composed of a housing 2 , an orifice plate 11 , an adsorbent coating 3 , a filter membrane holder 4 , a filter membrane 5 , an adsorbent 6 , and an adsorbent interlayer 7 . In this embodiment, the...

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Abstract

The invention discloses a sampling device and a concentration determination method for semi-volatile organic matters in ambient air, comprising a housing and an orifice plate. The orifice plate is aninner hollow cylinder, wherein an opening is formed in the top. The orifice plate is arranged inside the housing with the same structure, and is in interference fit with the housing. The upper part ofthe orifice plate is provided with a groove penetrating through the inner wall and the outer wall, an adsorbent coating is arranged on the outer wall of the orifice plate, the groove in the outer wall is closed and covered by the adsorbent coating, the inner part of the cavity below the orifice plate groove is sequentially provided with a filter membrane and an adsorbent sealed to the inner wallof the orifice plate from top to bottom, through holes are coaxially arranged at the bottom of the orifice plate and the housing, and the through holes are connected with a flowmeter and an air extracting power in sequence. According to the sampling device and the concentration determination method for the semi-volatile organic matters in ambient air, gas phase SVOC and particle phase SVOC can becollected separately, and the gas phase concentration and the particle phase concentration of the SVOC can be accurately determined.

Description

technical field [0001] The invention belongs to the field of indoor environment detection, and relates to a sampling device and a method for measuring the concentration of semi-volatile organic compounds in ambient air. Background technique [0002] Semi-volatile organic compounds in ambient air, hereinafter referred to as SVOC, mainly include dioxins, polycyclic aromatic hydrocarbons (PAHs) benzene, polychlorinated biphenyls, pyridines, quinolines, nitrobenzenes, phthalic acid Compounds such as esters, nitrosoamines, anilines, phenols, polychlorinated naphthalenes and polybrominated biphenyls. In addition to existing in the air in the form of gas phase, indoor SVOC will also be adsorbed on indoor particulate matter to form a particle phase, adsorbed on walls and indoor furniture surfaces to form an adsorption phase, and adsorbed on indoor dust to form a dust-falling phase. Existing survey data show that the human body stays indoors for more than 87%, and the amount of air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N1/34G01N30/88G01N30/06
CPCG01N1/24G01N1/34G01N30/06G01N30/88
Inventor 王新轲杨辉青刘柯
Owner XI AN JIAOTONG UNIV
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