Measuring method of residual quantity of preservatives

Abstract

The invention discloses a measuring method of the residual quantity of preservatives. The measuring method of the residual quantity of the preservatives is used for simultaneously measuring five preservatives through using gas chromatography-mass spectrometry, the five preservatives comprise methyl p-hydroxybenzoate, ethyl p-hydroxybenzaote, beta-naphthol, 4-phenylphenol and diphenyl ether; and the measuring method of the residual quantity of the preservatives specifically comprises the following steps of: smashing a sample to be measured, performing ultrasonic extraction on the sample to be measured through an organic solvent, concentrating the sample to be measured through a parallel evaporator for the first time, purifying the sample to be measured through a solid phase extraction column, concentrating the purified sample to be measured for the second time, fixing the volume through methanol, filtering the treated sample, and performing gas chromatography-mass spectrometry analysis on the filtered sample. The method has the advantages of being convenient and quick for operation and good in repeatability, and the like, the adding standard recovery of the method is 80.5-104%, the relative standard deviation (RSD) is 1.21-6.41%, and the method is capable of meeting the monitoring demands of the residual quantities of the five preservatives in fresh fruits.

Description

technical field [0001] The invention relates to the field of food safety testing, in particular to a method for measuring the residual amount of antiseptic preservatives, which uses gas chromatography mass spectrometry to simultaneously measure five antiseptic preservatives. Background technique [0002] The "Standards for the Use of Food Additives" (GB2760-2011) clearly stipulates the types of preservatives allowed to be used in fresh fruits, the maximum usage amount, and the residual amount. Although chemical antiseptic preservatives have antiseptic and fresh-keeping effects, most of them will have varying degrees of poisonous effects on the human body, bring adverse effects on health, and even cause cancer, teratogenicity, and mutagenesis. The monitoring of drug residues is of great significance. Parabens (methyl esters, ethyl esters), ethyl naphthol, 4-phenylphenol, and diphenyl ether are commonly used fruit preservatives, and they have certain toxicity to the human bod...

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Problems solved by technology

[0004] In view of above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of assay method of anticorrosion preservative residual quantity, the mensuration method of anticorrosion preservative residual quantity provided by the present invention is five kinds of anticorrosion preservative agents by gas chromatography mass spectrometry The method of realizing simultaneous determination aims to solve the problem of cumbersome detection process of antiseptic preservatives in the prior art

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