Method for determining chlorine organic pollutants in textile solid wastes by combining multiple methods

A technology for organic pollutants and solid wastes, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as low extraction efficiency, large amount of organic solvent, and inability to accurately determine the content of CCBs.

Active Publication Date: 2021-04-27
中华人民共和国乌鲁木齐海关
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods all have a large amount of organic solvents, low extraction efficiency, and are greatly affected by the matrix. Especially for the detection of chlorobenzene and chlorotoluene organic pollutants in complex textile solid waste, it is difficult to fully extract their target components and recover. The rate is low, and it is easily interfered by impurities, which has a great impact on the analysis results in the later stage, and cannot accurately determine the content of CCBs in textile solid waste.

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  • Method for determining chlorine organic pollutants in textile solid wastes by combining multiple methods
  • Method for determining chlorine organic pollutants in textile solid wastes by combining multiple methods

Examples

Experimental program
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Embodiment 1

[0025] This embodiment is a multi-method method for the determination of chlorine-based organic pollutants in textile solid waste. The method combines accelerated solvent extraction and solid-phase extraction to extract chlorine-based organic pollutants in textile solid waste. , purification and concentration treatment, and qualitative and quantitative analysis of the chlorine organic pollutants by gas chromatography. Specifically include the following steps:

[0026] S1: Preparation of standard solution: Prepare the standard product in turn with dichloromethane to make a standard stock solution with a concentration of 500ug / mL, then dilute the standard stock solution again into mixed standard solutions with different concentrations of 0.01-2mg / mL for later use, and put them in the refrigerator Store at -4°C, valid for 3 months. Described chlorinated organic pollutant standard substance comprises: chlorobenzene (99.9%), 1,2-dichlorobenzene (99.8%), 1,3-dichlorobenzene (99.7%)...

Embodiment 2

[0033] This example is to verify the sensitivity, accuracy, precision, reliability and practicability of the multi-method method for the determination of chlorine-based organic pollutants in textile solid waste described in Example 1.

[0034] The sensitivity verification method described in this example is: prepare a series of standard solutions of 0.01 to 2 mg / mL, according to the optimal experimental conditions described in Example 1, use textile solid waste 1 as a blank sample, and use a concentration of The abscissa, the peak area is the ordinate, draw a standard curve, calculate the detection limit with 3 times the signal-to-noise ratio (S / N=3), the correlation coefficient, regression equation, detection limit and other results of the method are shown in Table 1.

[0035] Table 1 Quantitative, qualitative ions, correlation coefficients, regression equations and detection limits of CCBs

[0036]

[0037] The above table shows that the correlation coefficients of the 17...

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Abstract

The invention discloses a method for determining chlorine organic pollutants in textile solid wastes by combining multiple methods, which combines an accelerated solvent extraction method and a solid phase extraction method, extracts, purifies and concentrates the chlorine organic pollutants in the textile solid wastes, and qualitatively and quantitatively determines the chlorine organic pollutants by a gas chromatography-mass spectrometry method. The method comprises the following steps: S1, preparing a standard solution; S2, establishing a gas chromatography-mass spectrometry method; S3, preparing a sample; S4, performing ASE extraction; S5, performing SPE purification; and S6, performing on-machine detection and the like. the ASE extraction has the advantages of small organic solvent consumption, rapidness, small matrix influence, high reproducibility and high automation degree, and the SPE purification has the advantages of high selectivity and high recovery rate, and can reduce the influence of interference impurities. According to the method disclosed by the invention, methods such as solvent acceleration, solid-phase extraction, a chromatographic column heating program and plain detection ion scanning are combined, and the established ASE / SPE-GC / MS method is high in sensitivity and suitable for monitoring chlorobenzene and chlorotoluene organic pollutants in complex textile solid wastes.

Description

technical field [0001] The invention relates to a multi-method combined method for determining chlorine-type organic pollutants in textile solid waste. [0002] technical background [0003] Chlorobenzene and chlorotoluene organic pollutants (CCBs) are one of the priority pollutants, mainly including chlorobenzene, dichlorobenzene, trichlorobenzene, tetrachlorobenzene, pentachlorobenzene, hexachlorobenzene, chlorotoluene, di Chlorotoluene, trichlorotoluene, tetrachlorotoluene, pentachlorotoluene and its isomers and more than 20 kinds of homologues. These chlorinated organic pollutants are important organic solvents and widely exist in complex textile solid waste. A large number of studies have shown that CCBs can migrate to each other in the environment, accumulate in organisms, and cause damage to human mucous membranes and internal organs. Therefore, How to quickly, accurately and sensitively detect whether CCBs are contained in textiles is of great significance. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/88
CPCG01N30/06G01N30/88
Inventor 龙志新牛增元刘俊俞凌云王小平姚海军李勇王铭
Owner 中华人民共和国乌鲁木齐海关
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