Method for detecting aniline in soil

Abstract

The invention discloses a method for detecting aniline in soil. The method comprises the following steps: preparing a sample, picking out broken stones, gravels and plant residues, grinding, sieving,and storing in a dark place; using acetone and normal hexane in a ratio of 1:1 as extraction solvents for extracting, setting the heating temperature of a nitrogen blowing concentrator to be 30 DEG C;concentrating the extracting solution to 1.0-2.0 mL by introducing small-flow nitrogen, concentrating in a GPC system, replacing a solvent with normal hexane to obtain an original-concentration extracting solution, blowing the original-concentration extracting solution to be nearly dry by using high-purity nitrogen on a concentrated nitrogen blowing instrument, fixing the volume to be 1.0 mL by using normal hexane, and filtering by using a 0.45 mum filter head; wherein the mobile phase ratio is methanol with the volume ratio of 55%, the flow velocity is 1mL / min, the sample size is 20muL, thecolumn temperature is room temperature, the detection wavelength is 230nm, drawing a standard curve by taking the mass concentration of each component as an abscissa and the corresponding peak area asan ordinate, calculating the standard deviation S, calculating the detection limit and evaluating the accuracy. The method is high in automation degree and suitable for simultaneous determination ofvarious aniline pollutants in soil.

Description

technical field [0001] The invention belongs to the detection field, and in particular relates to a method for detecting aniline in soil. Background technique [0002] As important organic chemical raw materials, aniline compounds are widely used in the fields of printing and dyeing, pharmaceuticals, etc., and are also important components of toxic and harmful products in industrial production processes. Such substances can cause harm to the human body through the respiratory tract, digestive tract, skin, etc., manifested as blood system damage, toxic liver damage, nervous system damage, teratogenicity, carcinogenicity, and mutagenicity. [0003] Due to the adsorption and physical and chemical absorption of the soil matrix, anilines can easily accumulate in the soil after entering the environment, causing lasting harm to the environment. The matrix of polluted soil is complex, there are many types of interfering substances and the content of target substances is low, so the...

AI Technical Summary

Problems solved by technology

[0003] Due to the adsorption and physical and chemical absorption of the soil matrix, anilines can easily accumulate in the soil after entering the environment, causing lasting harm to the environment.

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