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Gas chromatography method for organic mixture

A gas chromatographic analysis and organic mixture technology, applied in the analysis of materials, material separation, measuring devices, etc., can solve the problems of repetitive labor, low work efficiency, labor and material resources, etc., and achieve gas chromatographic analysis. The method is simple and efficient The effect of improvement and work efficiency improvement

Inactive Publication Date: 2017-05-10
青岛环湾检测评价股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since there may be many kinds of pollutants in the workplace at the same time, the 13 kinds of toxic substances mentioned above are usually detected during occupational hygiene testing. According to the current method, multiple sampling is required and testing is performed separately. Inconvenient, and there is repetitive labor, low work efficiency, cannot meet the needs of rapid detection, and consumes a lot of manpower and material resources

Method used

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  • Gas chromatography method for organic mixture
  • Gas chromatography method for organic mixture
  • Gas chromatography method for organic mixture

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Drawing of standard curve

[0033] Prepare the standard series, dilute the standard solution with carbon disulfide to form the standard series shown in Table 2.

[0034] Table 2 Standard series

[0035]

[0036] According to the standard series shown in Table 2, inject 1.0 μL respectively, and measure each standard series. The determination method is as follows: after the sample to be tested is vaporized in the vaporization chamber by the inlet, it is brought into the chromatographic column by the carrier gas at the same time, and each component in the sample is separated in the chromatographic column and then enters the detector, and the detector detects the sample that flows out of the column. Recognition and response, after the data processing system converts the signal of the detector into a chromatogram for qualitative or quantitative; the operating conditions are: the temperature of the chromatographic column is programmed, the initial temperature is 40 ° ...

Embodiment 2

[0041] Repeat test twice according to the detection method in embodiment 1, obtain data, as Figure 4 , Figure 5 shown.

Embodiment 3

[0043] According to the national standard method, the sample collected in Example 1 is analyzed, and the chromatograms of benzene, toluene, o-xylene, m-xylene, p-xylene, ethylbenzene, styrene are obtained respectively; the chromatogram of trichloroethylene; The chromatograms of alkane; the chromatograms of acetone and butanone; the chromatograms of cyclohexanone; the chromatograms of ethyl acetate, propyl acetate, and butyl acetate.

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Abstract

The invention relates to the technical field of organic matter separation, in particular to a gas chromatography method for an organic mixture. The method includes: a to-be-tested sample is gasified in a gasifying chamber and carried into a chromatographic column by carrying gas, and various components in the sample are separated in the chromatographic column, flow out of the chromatographic column and enters a detector, wherein the chromatographic column is polarity capillary chromatographic column, the temperature of the chromatographic column rises in a programmed manner, the initial temperature of the chromatographic column is 40 DEG C, is kept for 4-5 minutes, and rises to 110 DEG C at the speed of 8-12 DEG C / minute, the temperature of the gasifying chamber is 200-220 DEGC, the temperature of a detecting chamber is 220-250 DEG C, the carrying gas is nitrogen, the flow of the carrying gas is 1.3-2mL / minute, and the split ratio of the carrying gas is (10-30):1. By the gas chromatography method, benzene, toluene, dimethylbenzene, ethylbenzene, styrene, trichloro-ethylene, n-hexane, acetone, butanone, cyclohexanone, ethyl acetate, propyl acetate and butyl acetate can be completely separated and accurately measured by one detection, and work efficiency is increased evidently.

Description

technical field [0001] The invention relates to the technical field of organic matter separation, in particular to a gas chromatography analysis method for organic mixtures. Background technique [0002] Benzene, toluene, xylene, ethylbenzene, styrene, trichloroethylene, n-hexane, acetone, methyl ethyl ketone, cyclohexanone, ethyl acetate, propyl acetate, and butyl acetate are common toxic substances in occupational health testing. In recent years, acute and chronic occupational diseases caused by it have occurred from time to time, involving paint, printing, clothing and other manufacturing industries, and the detection of these substances is becoming more and more common. According to different structures, these toxic substances can be divided into six categories: alkanes, aromatic hydrocarbons, halogenated unsaturated hydrocarbons, aliphatic ketones, alicyclic ketones and saturated aliphatic esters. The current detection method is based on GBZ / T 160.38-2007 "Working Dete...

Claims

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 逄涛吴鹏司鹏敏李振伟
Owner 青岛环湾检测评价股份有限公司
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