Quartz crystal microbalance analyzing device with self-cleaning internally circulating gas circuit

A technology of quartz crystal and microbalance, which is applied in the direction of material absorption and weighing, can solve the problems of high cost, low degree of instrument integration, unfavorable portability, etc., and achieve the effect of low maintenance cost, high degree of integration and compact structure

Inactive Publication Date: 2012-05-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] However, the existing gas-phase quartz crystal microbalance device basically adopts direct sampling technology. In order to avoid contamination of the detector, an additional gas cylinder is required to provide carrier gas for cleaning, which not only has high cost, but also has a low degree of integration of the instrument. Not conducive to portability

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  • Quartz crystal microbalance analyzing device with self-cleaning internally circulating gas circuit
  • Quartz crystal microbalance analyzing device with self-cleaning internally circulating gas circuit
  • Quartz crystal microbalance analyzing device with self-cleaning internally circulating gas circuit

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] A self-cleaning quartz crystal microbalance analysis device with an internal circulation gas path, comprising a quartz crystal microbalance array 2, an adsorption trap 8 with a thermal analysis device, three-way valves 3, 7, 9, a gas circulation pump 5 and a pump air pump10.

[0024] The sample outlet and the sample inlet of the adsorption trap 8 with thermal desorption device are respectively connected with the first three-way valve 9 and the second three-way valve 7, and the other two ports of the second three-way valve 7 are respectively connected with the The sample gas source 6 is connected to one port of the third three-way valve 3; the other two ports of the third three-way valve 3 are respectively connected to the air inlet of the quartz crystal microbalance array 2 and the first port of the three-way valve 4 The other two interfaces of the first three-...

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Abstract

The invention relates to a volatile organic compound analyzer, in particular to a portable quartz crystal microbalance analyzing device with a self-cleaning internally circulating gas circuit. The device comprises a quartz crystal microbalance or a quartz crystal microbalance array, an absorption well with a thermal desorption device, a tee valve, a gas circulating pump and an air pump. Switch between base internal circulation and detection internal circulation can be realized through the on/off of the tee valve. Compared with the prior art, the quartz crystal microbalance analyzing device has the advantages of small volume, compact structure, high integration degree, easiness in mass production and carrying, low maintenance cost, suitability for outdoor online monitoring on volatile organic chemicals (VOCs), improvement on detection sensitivity and the like.

Description

technical field [0001] The invention relates to a volatile organic compound analysis instrument, in particular to a portable quartz crystal microbalance analysis device with a self-cleaning internal circulation gas path. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds whose melting point is lower than room temperature, boiling point at 50-260°C, and saturated vapor pressure at room temperature exceeding 133.322Pa. VOCs are complex in composition and low in content. Many of them are carcinogenic, teratogenic, mutagenic, and even genotoxic and cause "feminization", and most of them participate in the photochemical reaction process in the atmosphere, which is harmful to environmental safety and human survival and reproduction. pose a serious threat. Therefore, the development of rapid and real-time on-site detection technology for accurate detection and analysis of various toxic and harmful gases in the production environment and huma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
Inventor 李海洋梁茜茜仓怀文赵琨李京华渠团帅
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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