Method for testing MCCP in plastic or leather product

A technology of leather products and testing methods, which is applied in the testing field, can solve the problems of increasing testing cycle, increasing testing cost, and high cost, and achieves the effects of high standard addition recovery rate, reduced use times, and improved service life

CN109142555AInactive Publication Date: 2019-01-04深圳天祥质量技术服务有限公司
7 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-01-04
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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 ...

Examples

Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] In addition, the descriptions involving "first", "second" and so on in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of vari...