Automatic online monitoring method and device for VOCs (volatile organic chemicals) in water

A monitoring device and detection device technology, applied in the direction of analyzing materials, instruments, etc., can solve the problems of difficult equipment maintenance, complicated equipment, and difficulty in realizing automation, and achieve the goals of reducing the ratio of manual errors, high detection sensitivity, and improving monitoring efficiency Effect

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A monitoring device and detection device technology, applied in the direction of analyzing materials, instruments, etc., can solve the problems of difficult equipment maintenance, complicated equipment, and difficulty in realizing automation, and achieve the goals of reducing the ratio of manual errors, high detection sensitivity, and improving monitoring efficiency Effect

CN102735859AActive Publication Date: 2012-10-17LIHE TECH (HUNAN) CO LTD

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[0042] The invention discloses an automatic on-line monitoring method and device for VOCs in water, which realizes fully automatic unattended monitoring and data analysis, reduces the ratio of manual errors, and improves monitoring efficiency.

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] see figure 1 , figure 1 It is a schematic flow chart of the VOCs monitoring method in water provided by the embodiment of the present invention.

[0045]The core invention of the method for automatic on-line m...

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Abstract

The invention discloses an automatic online monitoring method and device for VOCs (volatile organic chemicals) in water, which can be used for automatically and quickly monitoring the contents and concentration of VOCs in water, and transmitting the real-time data to a remote center platform and realizing remote reverse control. The device comprises an automatic water taking device, an automatic sampling device, a purging and gathering concentrator, a gas chromatograph, a tandem type detector, an industrial controller and a data transmission module. The method and the device disclosed by the invention are fit for automatically on-line monitoring 60 volatile organic chemicals published by the method 502.2 of US EPA (Environmental Protection Agency), particularly for 29 volatile organic chemicals stipulated in Sanitary Standard for Drinking water. The method and the device have the advantages of quick speed, high monitoring sensitivity, stable and reliable performance, full-automatic monitoring and data transmission and on the like, can be applied for automatic monitoring stations, mobile emergency monitoring stations and labs.

Description

technical field [0001] The invention relates to the technical field of water quality monitoring, in particular to an automatic on-line monitoring method and device for VOCs in water. Background technique [0002] At present, the composition and concentration of VOCs (volatile organic compounds) in water are mainly detected by chromatographic technology. Due to its limited sensitivity, it is necessary to concentrate and separate the water sample to be tested before analysis and detection. Now the main concentration and separation technologies are: liquid direct Injection separation, liquid-liquid extraction, solid phase extraction, semi-permeable membrane extraction technology and headspace sampling technology, etc. [0003] The above-mentioned concentration and separation techniques have the following disadvantages: 1) The concentration and extraction process will lead to the loss of volatile organic compounds, resulting in small measurement results; 2) The concentration pro...

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Application Information

Patent Timeline

17 Oct 2012

Publication

CN102735859A

IPC: G01N35/00

Inventors: 王武林; 文立群