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Benzophenone purity reference material and preparation method thereof

A technology for reference material and benzophenone, applied in the field of benzophenone purity reference material and its preparation, can solve problems such as differences in delivery, difficulty in comparing data, and difficulty in arbitration of disputed data, so as to improve the consistency of comparison , reduce the uncertainty, and fill the gap of research and development

Active Publication Date: 2018-10-16
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photoinitiator content in paper packaging materials can be tested by applying relevant method standards for photoinitiator content testing, but due to the lack of a unified and traceable standard substance as a reference, there are the following problems: (1) Directly affect photoinitiator content. The accuracy of the initiator content makes it difficult to compare the data obtained by different units, which leads to differences between the supply and demand sides in the delivery of materials; (2) From the perspective of quality monitoring of production enterprises, due to the lack of standard substances, the data fluctuates greatly. It is difficult to conduct long-term horizontal comparisons of the content levels in products, thereby making it difficult to guide process adjustments; (3) due to the authenticity of the standard substance, it is difficult to trace the test data, and it is difficult to arbitrate disputed data; (4) for the purchaser, it is impossible Comprehensively assess and evaluate the level of photoinitiator content in the products supplied by different suppliers
[0004] So far, there is no precedent for the development of photoinitiator standard materials in China, and there are no reports on the development of such standard materials abroad, and the development of photoinitiator standard materials is in a blank state.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Buy crude benzophenone product from the market, take 50 grams of acetonitrile to make a nearly saturated solution, and prepare sample crystals by freezing crystallization. The specific conditions are: refrigerator 10℃ for 2 hours, according to 0.2℃ reduction / h cooling rate to -18℃ for 48 hours. Select the single crystal particles generated therein, and make a total of about 20 grams of pure product by batch; use acetonitrile to dissolve it, and add 20-100 micrograms of BHT stabilizer at the same time, and remove the solvent by rotary evaporation to obtain a pure product with uniform content; in powder form , Weigh and dispense into brown sample storage bottles under nitrogen protection, and prepare 200 bottles in one batch;

[0026] (2) The determination and uncertainty evaluation of pure benzophenone; determine the evaporation residue a of each pure product according to GB / T 9740-2008 "General Method for the Determination of Evaporation Residues of Chemical Reagents"...

Embodiment 2

[0047] (1) Buy crude benzophenone products from the market, take 50 g of ethyl acetate to make a nearly saturated solution, and prepare sample crystals by freezing crystallization. The specific conditions are: refrigerator at 10°C for 2 hours, according to the reduction The temperature is lowered to -18°C at a rate of 0.2°C / h for 48 hours. Select the single crystal particles generated in it, and make a total of about 20 grams of pure product by batch; use ethyl acetate to dissolve it, add 20-100 micrograms of BHT stabilizer, and remove the solvent by rotary evaporation to obtain a pure product with a uniform content; nitrogen Weigh and pack into brown sample storage bottles under protection, and prepare 200 bottles in one batch;

[0048] (2) The fixed value and uncertainty evaluation of pure benzophenone; same as in Example 1.

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PUM

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Abstract

The invention discloses a benzophenone purity reference material and a preparation method thereof, and relates to analysis and test of a photoinitiator used in various packaging materials, wherein thebenzophenone purity reference material can be used as a reference material in food packaging, cigarette packaging, workshop air detection and other tests. The preparation method of the benzophenone purity reference material comprises the following steps: (1) purification of a crude product of benzophenone; and (2) evaluation of a certified value and uncertainty of the benzophenone purity reference material. The benzophenone purity reference material provided by the invention has good stability under a storage condition of 0 DEG C, accurate certificating method, reliable traceability and relatively small synthesis uncertainty (0.1%-0.3%), can solve a problem that a current test method cannot trace a quantity value, can improve comparison consistency of test results of various units, and fills a blank of development of the benzophenone purity reference material at home and abroad.

Description

Technical field [0001] The present invention relates to the technical field of measuring and testing standard value transmission. Specifically, the present invention relates to a benzophenone purity standard substance used in various packaging materials and a preparation method thereof, which can be used as food packaging, cigarette box packaging, Standard substances in workshop air monitoring and other tests. Background technique [0002] UV printing is a printing process that uses ultraviolet light to dry and cure inks. It needs to match inks containing photoinitiators with UV curing lamps. At present, this process is widely used in the printing of paper packaging materials. Recent studies have found that after the ink is cured, the residual photoinitiator will migrate under certain conditions, which will bring safety risks to the packaging materials and cause potential hazards to human health. In 2007, in the European Union's “Res AP (2002) Resolution 1 of some member states...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N30/06G01N30/78
CPCG01N1/28G01N30/06G01N30/78
Inventor 牛佳佳范黎陈连芳陈宸
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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