Gas chromatography detection process of ethidene diamine

Abstract

The invention discloses a gas chromatography detection process of ethidene diamine, which comprises the following steps: early-stage preparation: measuring a sample and diluting the sample as a test solution; measuring ethylenediamine and diluting to obtain a reference solution; setting the working conditions of the instrument, wherein the temperature of a sample inlet is 195-205 DEG C, the temperature of a detection port is 255-265 DEG C, the carrier gas is nitrogen, the fuel gas is hydrogen, the combustion improver is air, the column flow is 1mL / min, and liquid automatic sample injection is adopted; and sampling and detecting: respectively measuring 1 microliter of the reference substance solution and 1 microliter of the test solution, directly sampling the liquid, recording and analyzing the atlas, and calculating to obtain the concentration of ethylenediamine. According to the present invention, the gas chromatography is adopted to detect the concentration of ethylenediamine, such that the method has advantages of high test precision and excellent quality of the obtained chromatogram.

Description

technical field [0001] The invention relates to the technical field of detection of articles, more specifically, to a gas chromatography detection process of ethylenediamine. Background technique [0002] Chromatography, also known as "chromatographic analysis", "chromatographic analysis", and "chromatography", is a separation and analysis method that is widely used in analytical chemistry, organic chemistry, biochemistry and other fields. At present, liquid chromatography and ion chromatography are mostly used for the detection of ethylenediamine. In the prior art, the liquid chromatographic method used to measure ethylenediamine is highly corrosive to the sampling system, and is prone to tailing and peak bifurcation in the chromatographic column, resulting in poor sampling accuracy and unable to meet the label volume ± 5%. limit requirements. When using ion chromatography to determine ethylenediamine, the selectivity is narrow. For most enterprises, the requirements cann...

AI Technical Summary

Problems solved by technology

In the prior art, the liquid chromatographic method used to measure ethylenediamine is highly corrosive to the sampling system, and is prone to tailing and peak bifurcation in the chromatographic column, resulting in poor sampling accuracy and unable to meet the label volume ± 5%. limit requirements

When using ion chromatography to determine ethylenediamine, the selectivity is narrow. For most enterprises, the requirements cannot be met, and the operation process is relatively complicated.

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