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Method for detecting o-chlorophenol in air

An o-chlorophenol, air technology, applied in the field of environmental analytical chemistry, can solve the problems of o-chlorophenol qualitative and quantitative analysis is blank, qualitative analysis and quantitative analysis are weak, etc., to achieve accurate qualitative and quantitative, high selectivity and Sensitivity, reducing the effect of sample purification and preparation

Inactive Publication Date: 2019-01-04
山东恒诚检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the GC-FID method is applied to detect the p-chlorophenol content in the air, and the qualitative analysis and quantitative analysis are very weak.
At present, based on the qualitative and quantitative analysis of o-chlorophenol in the air, it is still blank.

Method used

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  • Method for detecting o-chlorophenol in air
  • Method for detecting o-chlorophenol in air
  • Method for detecting o-chlorophenol in air

Examples

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Embodiment 1

[0025] Accurately weigh 0.1 g of o-chlorophenol with an analytical balance, and prepare a series of mixed standard solutions with concentrations of 1.00, 2.00, 4.00, 8.00, and 10.0 mg / L with ethanol as a solvent at constant volume;

[0026] Inject 1.0 μL of each standard solution into the Tenax sampling tube;

[0027] Make a standard curve: install the sampling tube in the preparation port of the automatic thermal desorption instrument, simulate sampling, and obtain a series of sampling tubes with calibration curves of 1.00, 2.00, 4.00, 8.00, and 10.0ng;

[0028] Sampling: Install the sampling tube in the automatic thermal desorption instrument, set the desorption temperature to 300°C, the valve box temperature to 110°C, and the pipeline temperature to 140°C.

[0029] A comprehensive atmospheric sampler is used to collect samples into Tenax sampling tubes to collect unorganized exhaust gas in an industrial area. The sampling flow rate is 0.5L / min, and the sampling time is 40mi...

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Abstract

The invention relates to the technical field of environmental analytical chemistry, in particular to a method for detecting o-chlorophenol in air. The method comprises the following steps that a sample is collected by using a Tenax sampling tube and a comprehensive atmospheric sampler, the adsorbed sample is thermally decomposed, and GC-MS detects and calculates the content of the o-chlorophenol in the sampling tube to obtain the concentration of the o-chlorophenol in the air; the sampling flow rate is 0.5 L / min and the sampling time is 40 min. The method for detecting the o-chlorophenol in the air has the advantages that the Tenax sampling tube, a thermal desorption instrument and a gas chromatography-mass spectrometry detector are combined with collection and detection of the o-chlorophenol in the air, the operation is simple, an organic solvent is not needed for desorption, the method is safe and environmentally friendly, and the adsorption and recovery efficiencies are high.

Description

technical field [0001] The invention relates to the technical field of environmental analytical chemistry, in particular to a method for detecting o-chlorophenol in air. Background technique [0002] The molecular formula of o-chlorophenol is C 6 h 5 ClO, also known as o-chlorophenol, is a colorless, odorous liquid that is easily soluble in water and organic solvents such as ethanol and ether. O-chlorophenol is flammable and can produce harmful gases such as carbon monoxide and hydrogen chloride. At the same time, it is toxic and can be harmful to the body if absorbed through the skin. It is generally used as a raw material for medicine, pesticide, dye and other organic synthesis. Melting point 7°C, volatile, with unpleasant smell, boiling point 174.5°C, flash point 63.9°C. It is obtained by oxidation of phenol into ortho and para isomers, and then separated. It can also be obtained from sodium phenate through chlorination and acidification, and can volatilize with ste...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/16
CPCG01N30/02G01N30/16
Inventor 苑旭洲施建刚蔡文超
Owner 山东恒诚检测科技有限公司
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