Rapid detection method for residual quantity of 32 compounds in food contact material
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A technology for food contact materials and detection methods, which is applied in the field of rapid detection of 32 kinds of compound residues in food contact materials, can solve the problems of no headspace gas chromatography detection method, avoid wasting a lot of time, improve detection sensitivity, Avoid the effect of polluting the environment
Pending Publication Date: 2021-05-11
SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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It is difficult to accurately confirm the qualitative confirmation of 32 compounds in this literature, and there are certain limitations in the actual application process
At present, there is no domestic research report on the detection method of 32 compounds in food contact materials by headspace gas chromatography
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Embodiment 1
[0030] (1) Prepare the sample to be tested:
[0031] Take a representative food contact sample and cut it into pieces no larger than 10mm×30mm as the sample; accurately weigh 0.004m 2 Put it in a headspace bottle, accurately add 40 μL of olive oil as an extraction solvent, fill it with nitrogen, seal it and shake it well, and carry out headspace extraction at 80°C for 30 minutes;
[0032] (2) Prepare standard solution:
[0033] (1) 0.1000g Weigh 0.1000g of 32 kinds of compounds respectively, put them into volumetric flasks, dissolve them with N,N-dimethylacetamide and make to volume respectively, and prepare standard stock solutions with a concentration of 1000mg / L.
[0034] (2) Dilute the standard stock solution step by step with N,N-dimethylacetamide to obtain 0.01mg / m 2, 0.02mg / m 2 , 0.04mg / m 2 , 0.08mg / m 2 and 0.10mg / m 2 A series of gradient standard working solutions.
[0035] (3) The gradient standard working solution is injected into the gas chromatograph by the ...
experiment example
[0049] Experiment example: recovery rate experiment and precision experiment
[0050] Add 0.050mg / m to blank food contact samples respectively 2 Concentration of 32 compounds, according to the above pretreatment and analysis method, each group was repeated 3 times, the average recovery rate was calculated by measurement, the precision was calculated by relative standard deviation (RSD), the recovery rate was 81.9% to 116.7%, and the RSD value was 4.9% ~18.0%, meeting the test requirements.
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Abstract
The invention provides a rapid detection method for the residual quantity of 32 compounds in a food contact material. The food contact material is subjected to qualitative analysis and / or quantitative analysis by an external standard method by adopting a headspace-gas chromatographic method. The 32 compounds are ethanol, acetone, isopropanol, tert-butyl alcohol, butanone, ethyl acetate, benzene, isopropyl acetate, propylene glycol monomethyl ether, valeraldehyde, n-butyl alcohol, sec-butyl acetate, toluene, hexanal, butyl acetate, ethylbenzene, styrene, p-xylene, m-xylene, propylene glycol methyl ether acetate, o-xylene, styrene, allyl benzene, 1, 2, 3-trimethylbenzene, n-propyl benzene, alpha-methyl styrene, benzaldehyde, 1, 2, 4-trimethylbenzene, sec-butylbenzene, n-butylbenzene, 1, 3, 5-trimethylbenzene and divinyl benzene. The method is simple, convenient and easy to operate, separation is performed in a programmed heating mode, quantification is performed by an external standard method, and the linear correlation coefficient is 0.995 when the concentration is 0.01-0.10 mg / m<2>.
Description
technical field [0001] The invention relates to a rapid detection method for 32 kinds of compound residues in food contact materials, in particular to 32 kinds of compounds (ethanol, acetone, isopropanol, tert-butanol, methyl ethyl ketone, ethyl acetate, Benzene, isopropyl acetate, propylene glycol methyl ether, valeraldehyde, n-butanol, sec-butyl acetate, toluene, hexanal, butyl acetate, ethylbenzene, styrene, p-xylene, m-xylene, propylene glycol methyl ether ethyl Ester, o-xylene, styrene, styrene propylene, 1,2,3-trimethylbenzene, n-propylbenzene, α-methylstyrene, benzaldehyde, 1,2,4-trimethylbenzene, sec-butylbenzene, n- Headspace gas chromatographic detection method for butylbenzene and 1,3,5-trimethylbenzene, divinylbenzene) residues. Background technique [0002] Food contact materials are products that are in direct contact with food, and their hygiene and safety are closely related to people's health. Novelization, aesthetics and branding are new features of food ...
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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/16
CPCG01N30/02G01N30/16
Inventor 韩陈
Owner SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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