Method for testing MCCP in plastic or leather product

Abstract

The invention discloses a method for testing MCCP in a plastic or leather product, which comprises the following steps: sampling; pretreating and detecting content of MCCP in a target object after pretreating; wherein the pretreating comprises the following steps of: mixing a sample with an extracting agent and carrying out ultrasonic treatment for a first appointed time period at a first appointed temperature; adding a purifying agent and carrying out ultrasonic treatment for the first appointed time period at the first appointed temperature; taking out an appointed volume of extract liquid for drying and adding a appointed volume of normal hexane for re-dissolution; adding an appointed volume of concentrated sulfuric acid and carrying out vortex for a second appointed time period, and standing a vortex-treated sample solution for a third appointed time. By using the method, each ion pair of MCCP can be effectively separated, the detection accuracy can be improved, by using a GC-NCI-MS analyzer, the use frequency of a chromatographic column is reduced, the service life of the chromatographic column is prolonged, and the instrument response value is proper and meets the general requirement of instrument detection, an average adding standard recovery rate is high, a range of 85-110% can be achieved.

Description

technical field [0001] The invention relates to the detection field, in particular to a method for testing MCCP in plastic or leather products. Background technique [0002] Medium-chain chlorinated paraffin (MCCP) is an environmentally hazardous substance, which is difficult to degrade, and has many isomers and many interfering substances. The traditional test method is to use a single solvent for extraction and SPE C18 column purification, and to perform content detection through GC-MS, GC-ECD analysis and other operations. The method of extraction with a single solvent cannot separate the impurity interference brought by the sample matrix well, and it is difficult to characterize it. SPE C18 column purification is time-consuming and costly, and GC-MS and GC-ECD can only perform simple qualitative analysis of samples, but cannot achieve accurate quantitative analysis. This operation will increase the test cycle, increase the cost of testing, and will also cause a lot of ...

AI Technical Summary

Problems solved by technology

The method of extraction with a single solvent cannot separate the impurity interference brought by the sample matrix well, and it is difficult to qualitative

SPE C18 column purification is time-consuming and expensive, and GC-MS and GC-ECD can only perform simple qualitative analysis of samples, but cannot achieve accurate quantitative analysis

This operation will increase the test cycle and test cost, and will also cause a lot of waste of human resources and working time, reduce the competitiveness of the company in the testing industry, and hinder the sustainable development of the company

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