Azo solid-phase extraction column and preparation method thereof

Abstract

The invention relates to the technical field of chemical instruments, and discloses an azo solid-phase extraction column and a preparation method thereof. The azo solid-phase extraction column comprises a column pipe, an upper sieve plate and a lower sieve plate, the upper sieve plate and the lower sieve plate are arranged in the column pipe at intervals, a sample adding opening is formed in the top of the column pipe, and a discharging opening is formed in the bottom of the column pipe; the diameters of the upper sieve plate and the lower sieve plate are the same as the inner diameter of thecolumn pipe, an extraction cavity is formed between the upper sieve plate and the lower sieve plate, the extraction cavity is filled with diatomite, and the particle size of the diatomite is graduallyincreased from bottom to top; flavanone is impregnated and adsorbed on the upper sieve plate; and the aperture of the lower sieve plate is smaller than the particle size of diatomite in the extraction cavity. The azo solid-phase extraction column is simple in structure and convenient to use, has a color change indication function, and is high and stable in flow speed, free of layer breakage, freeof powder leakage and stable in aromatic amine recovery rate in the extraction process, and in addition, the preparation method of the azo solid-phase extraction column is simple, easy to implement and suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of chemical instruments, in particular to an azo solid-phase extraction column and a preparation method thereof. Background technique [0002] After textiles, clothing, leather goods, and footwear products are dyed with azo dyes containing prohibited aromatic amines, if the above products are used for a long time, the azo fuel will enter the human body through the skin. Under the biochemical conditions of normal human metabolism, the azo dye Decomposition reduction reactions may occur, liberating carcinogenic aromatic amines. The activation of carcinogenic aromatic amines will change the DNA structure of the human body, eventually causing human lesions and inducing cancer. [0003] For the detection of azo dyes in textiles, clothing, leather goods, and footwear products, the national standard GB / T17592-2011 "Determination of Prohibited Azo Dyes in Textiles" and GB / T 19942-2005 "Prohibited Azo Dyes in Chemic...

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Problems solved by technology

[0007] The azo solid-phase extraction column provided by the present invention is mainly used to solve the complex structure of the diatomite extraction column for detecting azo at present, the prohibition of aromatic amine recovery rate is unstable, the repeatability is poor, the flow rate is slow and unstable, The low extraction efficiency and the diatomite is easy to break and leak powder during the extraction process, which seriously affects the accuracy of the test results.

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