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Simple and convenient testing method for phenylamine in soil

A method for measuring aniline, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of large influence of experimental parallelism, few aniline determination methods, and large amount of organic solvents, and achieve high extraction efficiency, high sensitivity, The effect of high recovery rate

Inactive Publication Date: 2015-05-27
浙江中一检测研究院股份有限公司
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Problems solved by technology

The traditional liquid phase extraction method is a widely used sample pretreatment method, but it has the disadvantages of cumbersome operation, long extraction time and large amount of organic solvent
There are few methods for the determination of aniline in soil. There are reports (Huang Xiaohua, Determination of Aniline in Soil by Headspace Chromatography, Analytical Testing Technology and Instruments, No. 4, 2012) on the application of static headspace method to the determination of aniline in soil, but pH etc. The conditions have a great influence on the parallelism of the experiment, and the large volume of steam will affect the separation effect, and too much water vapor will also damage the chromatographic column

Method used

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  • Simple and convenient testing method for phenylamine in soil
  • Simple and convenient testing method for phenylamine in soil

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Experimental program
Comparison scheme
Effect test

Embodiment

[0019] Embodiment, the determination of aniline in the soil sample of a certain dyeing and chemical factory relocation site

[0020] In order to verify the applicability of the present invention, the soil samples of the relocation site of a certain dyeing and chemical factory were analyzed, and the specific implementation steps are as follows:

[0021] (1) Dissolve an appropriate amount of aniline in methanol to prepare aniline standard solutions of 20, 10, 4, 2, 1, and 0.5 mg / L, and use gas chromatography-mass spectrometry (GC-MS) for analysis to obtain aniline standard curve line. Set chromatographic conditions: chromatographic column HP-5 (30m×0.32mm×0.25μm), injection port 200°C. Set mass spectrometry conditions: mass spectrometry uses EI ion source (electron energy 69.9eV), ion source temperature 230°C, quadrupole 150°C, scan range 40~300amu;

[0022] (2) Weigh 4g of the soil sample into the purge and trap bottle, add 0.8mol / L hydrochloric acid, take it out after ultras...

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Abstract

The invention relates to a simple and convenient testing method for phenylamine in soil. The simple and convenient testing method for phenylamine in soil mainly comprises the steps of extracting, blowing, capturing and testing phenylamine in soil at two steps with acid and alkali. The method for extracting, blowing, capturing and testing trace phenylamine in soil at two steps with acid and alkali is simple, convenient, rapid, small in interference, accurate, reliable and low in detection limit, and the detection operation and study requirements of people can be met. By adopting the simple and convenient testing method, the blank of the method for extracting, blowing, capturing and testing trace phenylamine in soil at two steps with acid and alkali is made up.

Description

technical field [0001] The invention relates to a simple method for determining aniline in soil, in particular to a method for simply determining aniline in soil through acid-base two-step extraction-purging and trapping. Background technique [0002] Aniline (Aniline, C 6 h 7 N) is an intermediate in the synthesis of azo dyes, herbicides, insecticides, drugs, explosives, etc., and is widely used in the chemical industry. Aniline is very toxic, especially carcinogenic. It can enter the human body through inhalation, oral intake, skin, etc., causing damage to the human body and causing methemoglobinemia. Therefore, it has been approved by USEPA and my country. The Ministry of Environmental Protection has included it in the list of environmental priority monitoring pollutants. In addition, aniline has a certain polarity and is slightly soluble in water, which leads to a greatly enhanced migration ability in its environment. A large amount of aniline-containing wastewater wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 何莲李怀瑞吴小春宣坤飞江帅叶良祖
Owner 浙江中一检测研究院股份有限公司
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