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Detecting method of content of benzene-type compounds in food contact material

A technology for food contact materials and detection methods, which is applied in the field of headspace-gas chromatography-tandem mass spectrometry detection, can solve the problem of difficult qualitative confirmation of 14 kinds of benzene compounds by gas chromatography, and achieves ensuring accuracy, improving detection sensitivity, and extracting methods. easy effect

Active Publication Date: 2019-07-09
SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can measure 7 kinds of benzene series in the composite plastic film, the sampling amount is a composite film bag with a certain area, which is not suitable for food contact materials with a large thickness; and the time used is as long as 18min, and some The types of benzene compounds have not been mentioned in the literature. It is difficult to accurately confirm the qualitative confirmation of 14 benzene compounds by gas chromatography, and there are certain limitations in the actual application process.
[0004] At present, there is no research report on the headspace-gas chromatography-tandem mass spectrometry detection method for the content of 14 benzene compounds in food contact plastics in China

Method used

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  • Detecting method of content of benzene-type compounds in food contact material
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  • Detecting method of content of benzene-type compounds in food contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1), prepare the sample solution to be tested:

[0037] Take a representative sample of food contact materials, cut it to less than 0.5mm×0.5mm, and mix it as a sample. Weigh 1.0g sample (accurate to 0.0001g), put it in a headspace bottle, accurately add 1~10mL extractant N,N-dimethylacetamide, seal it and shake it well, dissolve it at 20~40℃ for 0.5h ~10h, the solid-liquid ratio of the sample to the extractant is: 1g sample: 10mL extractant.

[0038] 2), prepare standard solution:

[0039] (1) Weigh 0.1g (accurate to 0.00001g) of benzene, toluene, ethylbenzene, styrene, o-xylene, p-xylene, m-xylene, cumene, 1,2,3-trimethylbenzene, n- Propylbenzene, 1,2,4-trimethylbenzene, sec-butylbenzene, n-butylbenzene and 1,3,5-trimethylbenzene standard substances were placed in a volumetric flask, dissolved with N,N-dimethylacetamide and made to volume, Thereby configure the standard stock solution that concentration is 1000mg / L;

[0040] (2) Dilute the above standard stock soluti...

experiment example

[0072] Experiment example: recovery rate experiment and precision experiment

[0073] Add 14 kinds of benzene compounds at a concentration of 20mg / kg to the blank food contact material sample respectively, according to the above pretreatment and analysis method, repeat 6 times for each group, measure and calculate the average recovery rate, and the precision is expressed as relative standard deviation (RSD) Calculated, the recovery rate was 81.0%-117.3%, and the RSD value was 1.3%-9.7%, meeting the test requirements.

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Abstract

The invention discloses a detecting method of a content of benzene-type compounds in a food contact material. N,N-dimethylacetamide is used as a solvent dissolving test piece, extraction solutions of14 kinds of benzene-type compounds are obtained, and then a headspace-gas chromatography-tandem mass spectrometry method is adopted to perform qualitative analysis and / or quantitative analysis on theextraction solutions. According to the detecting method of the content of the benzene-type compounds in the food contact material, ion monitoring is used for qualitative confirmation and quantitativedetermination, the precision of the detecting result is ensured, and the detecting sensitivity is improved; and a headspace method is adopted, directly test piece feeding analysis is carried out, theoperation is easy and rapid, and consumption of large-quantity of solvents and environmental pollution are avoided.

Description

technical field [0001] The invention relates to 14 kinds of benzene compounds (benzene, toluene, ethylbenzene, styrene, o-xylene, p-xylene, m-xylene, cumene, 1,2,3-trimethylbenzene, Headspace-gas chromatography-tandem mass spectrometry detection method for n-propylbenzene, 1,2,4-trimethylbenzene, sec-butylbenzene, n-butylbenzene and 1,3,5-trimethylbenzene). Background technique [0002] In the modern food production, circulation and sales system, food contact materials play an extremely important role. They can be called the "coat" of food and are closely related to people's daily life. However, while providing convenience for life, food contact materials also bring corresponding safety problems. The residues of benzene compounds in materials are too high, which may cause these benzene series compounds to migrate into food, causing poisoning to the hematopoietic system and nervous system. System damage, severe cases can cause leukemia and other diseases. Therefore, a rapid...

Claims

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Application Information

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IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/884
Inventor 韩陈孙多志吴亚平刘峻左莹罗婵
Owner SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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