Method for valuing 4-bromodiphenyl ether purity standard substance

Abstract

The invention discloses a method for valuing a 4-bromodiphenyl ether purity standard substance. The method comprises the following steps: valuing the organic purity of the 4-bromodiphenyl ether purity standard substance by using a high performance liquid chromatography; determining the organic purity value of the 4-bromodiphenyl ether purity standard substance by using a gas chromatographic method; testing the moisture of the 4-bromodiphenyl ether purity standard substance by using a Karl Fischer moisture tester, testing inorganic elements contained in the 4-bromodiphenyl ether purity standard substance by using ICP / MS (Inductively Coupled Plasma / Mass Spectrometry), and carrying out solvent residue analysis on the 4-bromodiphenyl ether purity standard substance by using gas chromatography-mass spectrometry; and determining the value of the 4-bromodiphenyl ether purity standard substance through a formula. According to the method for determining the value of the purity standard substance of 4-bromodiphenyl ether, organic impurities are determined through high performance liquid chromatography and gas chromatography, the moisture content is determined through a Karl moisture analyzer, the content of inorganic impurities is determined through ICP / MS, solvent residue analysis is conducted, and the value of the purity standard substance of 4-bromodiphenyl ether is determined through a mass balance method, and the traceability is realized.

Description

Technical field [0001] The present invention belongs to the field of metering, and is related to the method for determining the qualitative substance of the organic object, and specifically, the value of 4-bromo diphenyl ether purity standard material setting method. Background technique [0002] Polybromodiphenyl ether is a recognized global organic pollutant that is limited or forbidden to use, developing polybromobenzene ether standards, determining its purity and impurities therefrom, for detecting polybromide two Phenyl ether compounds, guaranteeing production safety and people's livelihood health is of great significance. [0003] In the prior art, the detection of polybromobenzene ether is generally used with gas chromatography-mass spectrometry, such as the method of determination of polybromobenzyl ether in water quality, and HJ 952-2018 discloses more soil and sediments. Determination of bromodiphenyl ether. 4-bromo diphenyl ether is a kind of polybromobiphenyl ether, a...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of 4-bromodiphenyl ether purity standard substance determination method, to solve the problem that the detection method existing in the prior art can not satisfy the determination requirement

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