Method for detecting various phthalic acid ester plasticizers in vegetables, fruits and edible mushrooms at same time

Abstract

The invention provides a method for detecting various phthalic acid ester plasticizers at the same time. The method includes the steps that firstly, a sample is extracted and purified in an optimized QuEChERS pretreatment mode; secondly, analysis is carried out in a gas chromatography-tandem mass spectrometry mode; finally, accurate qualitative and quantitative analysis is carried out with an isotope internal standard method. The method can be applied to detecting twenty-three phthalic acid ester plasticizers in plant source character foods such as common Chinese cabbages, tomatoes, strawberries, grapes, shiitake mushrooms and agaric at the same time. By means of the method, the plasticizers introduced through external source ways are avoided to the maximum degree, the pretreatment step is simple, consumed time of solid-phase extraction and purification is shortened, and consumed solvents and argent compound losses of the solid-phase extraction and purification are reduced; the method has the advantages of being sensitive, accurate, good in stability, short in consumed time and easy to popularize; the method can be suitable for detecting mass samples at the same time.

Description

Technical field [0001] The invention relates to a method for detecting multiple phthalate plasticizers in vegetables, fruits and edible fungi, and belongs to the technical field of agricultural product safety detection. Background technique [0002] Phthalates (phthalicacidestersPAEs) are an important type of chemical raw materials, which belong to the bulk industrial products. According to relevant statistics, the global annual output of phthalic acid esters is as high as 6 million tons. It has a wide range of uses. Almost all industrial products such as pesticides, fertilizers, cosmetics, pharmaceuticals, lubricants, coatings, etc. contain PAEs, but they are mainly used as modified additives for plastics to increase the plasticity of products. And flexibility, improve the strength of the product, so it is called a plasticizer. Because PAEs and polyolefin plastic matrix are not combined in the form of chemical bonds, they are easily freed and diffuse from the plastic to soil, w...

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Problems solved by technology

For the GC-MS analysis method, since each compound of PAEs plasticizer basically contains the same ion m / z=149, if the sample matrix is ​​relatively complex and there is interference that makes the chromatographic separation poor, it is possible to scan only based on selected ions Misjudgment occurs as a result of

The methods published in foreign journals on the determination of PAEs plasticizers mostly focus on the food field, such as edible oil, wine, beverages, etc., and have little significance for the pretreatment methods of plant-derived agricultural products such as vegetables, fruits, and edible fungi. Big

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