Benzophenone purity standard substance and preparation method thereof

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 transfer, specifically, the present invention relates to a standard substance of benzophenone purity used in various packaging materials and a preparation method thereof, which can be used as food packaging, cigarette case packaging, Standard substances in workshop air monitoring and other tests. Background technique [0002] UV printing is a printing process that dries and cures ink by ultraviolet light. It needs to match ink containing photoinitiator with UV curing lamp. At present, this process is widely used in the printing of paper packaging materials. Studies in recent years 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 harm to human health. In 2007, in the European Union's "Res AP (2002) resolution 1 of some member s...

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.

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