A kind of gas chromatography packed column and its preparation method and application

Abstract

The invention provides a gas chromatographic packed column and its preparation method and application. The gas chromatographic packed column includes a packed column tube and a packed column stationary phase filled therein. Including attapulgite; the preparation steps of filling column fillers include: crushing attapulgite and sieving to obtain attapulgite powder with a particle size of not less than 200 mesh; adding binder to attapulgite powder and mixing uniformly to make attapulgite pellets , dried at 250-350°C; the attapulgite balls are sieved and separated to obtain a uniform packed column packing with a particle size of 40-140 mesh. The invention provides a new gas chromatographic packed column, which expands the types of gas chromatographic packed columns; the gas chromatographic packed column provided by the invention is applied to the analysis of dissolved gas in transformer oil, and can realize sensitive and fast , Accurate detection of transformer oil dissolved gas.

Description

technical field [0001] The invention relates to the field of analytical chemistry, in particular to a gas chromatographic packed column and a preparation method thereof, and the application of the gas chromatographic packed column in the analysis of transformer oil dissolved gas. Background technique [0002] Chromatography is a separation and analysis method that is widely used in the detection and analysis of petroleum, chemistry, environment, biology, food and many other fields. The chromatographic column in chromatography is directly related to the separation effect and detection sensitivity, and the preparation of chromatographic column is an important part of chromatographic analysis. Packing is an important feature of the chromatographic column, which determines the basic characteristics of the chromatographic column. Whether the chromatographic peaks can be separated depends first on the packing. Packed column is one of the more commonly used chromatographic columns...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that there are few types of stationary phase fillers commonly used in existing gas chromatography packed columns, and the corresponding types of commonly used gas chromatography packed columns are also less. Considering that the chromatographic packed columns require that the adsorbent-type stationary phase fillers have the ability to be used at high temperatures use, large adsorption capacity, and good thermal stability; the inventors found that attapulgite is chemically inert after treatment, has a large specific surface area, good adsorption, and has the effect of molecular sieves. These characteristics make it suitable for chromatographic filling. Column adsorbent filler; and attapulgite has the characteristics of being a catalyst carrier, which can be used as a carrier for gas chromatography packed columns after surface treatment; based on the above findings, the present invention provides a new gas chromatography packed column and its preparation The method, wherein the stationary phase includes a packed column filler prepared from attapulgite, the gas chromatographic packed column provided by the invention is used for gas chromatographic analysis, and is especially suitable for analyzing dissolved gas in transformer oil, and can solve the problem of using a chromatographic column in the prior art. The problem of low accuracy in analyzing dissolved gas in transformer oil with a single packed column

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