Detection method of determining 16 types of photoinitiators in paper printing and packaging material

A photoinitiator, printing and packaging technology, applied in] The present invention belongs to the technical field of physical and chemical inspection of paper printing and packaging materials, can solve the problems of affecting cell membrane movement, health hazards, contaminated food, etc., and achieves low cost, low consumption, Effects with high sensitivity and accuracy

Active Publication Date: 2012-12-12
CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] However, recent studies have found that after the UV ink is cured, the residual UV photoinitiator in it can also undergo chemical migration or contaminate the food in the package through physical contact under certain conditions, thereby causing potential harm to human health.
At the end of 2005, Nestle found packaging ink components (photoinitiator ITX) in the European market during random inspections, and recalled a large amount of milk from France, Portugal, Spain and Italy. Although there was no comprehensive and accurate ITX toxicology research data at that time, However, the European Food Safety Authority (EFSA) stipulates that ITX is restricted in food, and Momo et al. have concluded that ITX will affect the movement of cell membranes

Method used

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  • Detection method of determining 16 types of photoinitiators in paper printing and packaging material
  • Detection method of determining 16 types of photoinitiators in paper printing and packaging material
  • Detection method of determining 16 types of photoinitiators in paper printing and packaging material

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example 1

[0048] In this embodiment, the detection method for the content of 16 kinds of photoinitiators in the paper packaging material is as follows.

[0049] 1. Reagents and materials

[0050] Unless otherwise specified, reagents of analytical grade or above should be used. Including water; n-hexane; ethanol; p-hydroxyanisole (polymerization inhibitor): purity ≥ 98%; photoinitiator: purity ≥ 97%, see Table 1; deuterated anthracene (internal standard): purity ≥ 98%.

[0051] 2. Solution configuration

[0052] Extractant: Prepare a mixed solution of n-hexane and ethanol with a concentration of p-hydroxyanisole of 500 mg / L (1:1, V / V)

[0053] Internal standard stock solution: use the extractant to prepare a deuterated anthracene internal standard solution with a concentration of 1000 mg / L. Sealed and protected from light and stored at 0 ℃ ~ 4 ℃.

[0054] Preparation of standard solution

[0055] Weigh 25 mg of photoinitiator to the accuracy of 0.1 mg, dissolve it with extractant an...

example 2

[0072] In order to ensure the stability of photoinitiators in the analysis process, the method of the present invention investigates the influence of visible light and p-hydroxyanisole (HQMME) inhibitors on the stability of 16 photoinitiators.

[0073] The present invention configures n-hexane / ethanol (1:1, V:V) solutions of photoinitiators of the same concentration in four groups of 10 mL volumetric flasks, which are respectively recorded as A, B, C, and D (A: common volumetric flask No polymerization inhibitor added; B: ordinary volumetric flask with polymerization inhibitor added; C: brown volumetric flask without polymerization inhibitor; D: brown volumetric flask with polymerization inhibitor added), each group of samples was made in 3 parallels, and the added polymerization inhibitor The concentration is 500 mg / L. Then place the sample on the window sill of a laboratory exposed to sunlight, and detect it after 3 days, and the results are as follows: image 3 shown. It ...

example 3

[0077]The study found that although the n-hexane / ethanol (1:1, V / V) system can extract the photoinitiator in the sample well, it will also extract a large amount of ink macromolecular pigments at the same time. The resistance of membrane filtration is very high, and the impurity removal effect is not good. At present, the commonly used sample impurity removal techniques mainly include solid-phase extraction, liquid-liquid extraction, and dilution. After experiments, it was found that solid-phase extraction still has the characteristics of high resistance and poor impurity removal effect, while the dilution and impurity removal method will greatly reduce the sensitivity of the detection method. Therefore the present invention investigates the effectiveness of the liquid-liquid extraction impurity removal method.

[0078] In the present invention, 5 mL of positive sample extract and standard working solution and 10 mL of stoppered graduated test tube were respectively added to ...

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Abstract

The invention relates to a detection method of determining 16 types of photoinitiators in a paper printing and packaging material, which is used for determining residual amounts of the 16 types of photoinitiators of 2-hodroxy-2-methyl-1-phenylacetone, mehtyl phenylglyoxylate, benzophenone and the like and is characterized by comprising the following concrete steps of: a, sample pretreatment; b, preparation of a standard work solution; c, instrumental analysis; and d, result calculation. Compared with the prior art, through sample pretreatment and optimization of instrumental analysis conditions, the detection method has the advantages that efficiency is high, the 16 kinds of photoinitiators can be simultaneously analyzed and determined within 25m; and printing ink impurities in a sample extraction solution can be better removed in a liquid-liquid distribution impurity removal mode adopted in the sample pretreatment process, so that cost is low, consumption is little, efficiency is high, and sensitivity is high; and in addition, the detection method also has the advantages of high accuracy and good repeatability.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical inspection of paper printing and packaging materials, and in particular relates to 2-hydroxy-2-methyl-1-phenylacetone, methyl benzoylformate, benzophenone, 1-Hydroxycyclohexylphenylphenone, ethyl 4-dimethylaminobenzoate, 4-methylbenzophenone, 2,2-dimethoxy-2-phenylacetophenone, o-benzoyl Methyl benzoate, isooctyl N,N-dimethylaminobenzoate, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, 2-isopropyl Thioxanthone, 4-phenylbenzophenone, 2,4-diethylthioxanthone, 4,4-bis(dimethylamino)benzophenone, 4,4-bis(diethyl Amino) benzophenone and 2-benzyl-2-dimethylamino-1-(4-morpholine phenyl) butanone 16 photoinitiator residue determination techniques. Background technique [0002] Colorful packaging brings great convenience to our life, but its surface printing ink has become a potential source of pollution. Compared with solvent-based inks, ultraviolet (UV) curable inks themselve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 李中皓边照阳唐纲岭范子彦杨飞刘楠胡清源张洪非陈欢李雪姜兴益
Owner CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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