Chromatographic analysis method

A chromatographic analysis and chromatographic column technology, which is applied in the direction of analyzing materials, material separation, measuring devices, etc., can solve the problems of shortening the service life of chromatographic columns, easily polluting chromatographic columns, interference analysis, etc., to save consumption, reduce pollution, and reduce interference Effect

Active Publication Date: 2015-01-14
佛山市南海区环境保护监测站
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Problems solved by technology

[0002] At present, for the detection of non-methane total hydrocarbons, most of them are analyzed according to the method described in the standard HJ / T 38-1999 of the Ministry of Environmental Protection. Long, it is easy to interfere with the analysis of the next sample gas, and it is easy to contaminate the chromatographic column and shorten the service life of the chromatographic column

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Embodiment Construction

[0056] The chromatographic analysis system of the present invention is used to detect gas as an example. In the preferred embodiment of the present invention, it is illustrated by taking its application in measuring non-methane total hydrocarbons in air and waste gas as an example.

[0057] Such as figure 1 The chromatographic analysis system 400 of the preferred embodiment of the present invention includes a sampling device 100 and a gas chromatograph 200 , and the sampling device 100 provides the gas chromatograph 200 with a gas to be detected or a carrier gas. The gas chromatograph 200 includes a first chromatographic column 210 , a second chromatographic column 230 , a damping column 250 and a hydrogen flame ionization detector (Flame Ionization Detector, FID detector) 270 . The sampling device 100 includes a flow controller 10 , a ten-way valve 30 and a six-way valve 50 . During detection, the carrier gas flowing through the flow controller 10 forms two streams of airfl...

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Abstract

The invention relates to a chromatographic analysis method. According to the chromatographic analysis method, a gas chromatograph and a sampling device are used, wherein the sampling device is used for providing fluid to be detected to the gas chromatograph; the gas chromatograph comprises a first chromatographic column, a second chromatographic column, a damping column and an FID detector; the sampling device comprises a ten-way valve and a six-way valve; the six-way valve can be selected to be in a state I and a state II; the ten-way valve can be selected to be in a first state and a second state; and the chromatographic analysis method comprises the steps of sample gas quantification, detection and back flushing. The chromatographic analysis method has the advantages that the dosage of carrier gas is saved, the accuracy of the sample gas separation is improved, the accuracy of the sample gas detection is improved, the life of the chromatographic columns is prolonged, and two different substances of the same sample gas can be measured at the same time, so that the working efficiency is greatly improved.

Description

technical field [0001] The invention relates to a chromatographic analysis method. Background technique [0002] At present, for the detection of non-methane total hydrocarbons, most of them are analyzed according to the method described in the standard HJ / T 38-1999 of the Ministry of Environmental Protection. Long, easy to interfere with the analysis of the next sample gas, and easy to contaminate the chromatographic column, shortening the service life of the chromatographic column. Contents of the invention [0003] In view of this, it is necessary to provide a chromatographic analysis method that can simultaneously measure two components in one injection and improve the service life of the chromatographic column. [0004] The object of the present invention is achieved through the following technical solutions: [0005] A chromatographic analysis method, using a gas chromatograph and a sampling device, the sampling device provides the fluid to be detected for the gas ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/20G01N30/46
Inventor 陈鉴祥吴建勋周健能简颖涛李佩贤
Owner 佛山市南海区环境保护监测站
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