3-methylbenzophenone purity standard substance and preparation method thereof

Abstract

The invention discloses a 3-methylbenzophenone purity standard substance and a preparation method thereof, relates to analysis and testing of photoinitiators using in various packaging materials, the3-methylbenzophenone purity standard substance can be using as a standard substance in testing of food packaging, cigarette box packaging, workshop air detection, and the like, and the preparation method of the standard substance comprises: (1) purification of a 3-methylbenzophenone crude product; and (2) certification of the 3-methylbenzophenone purity standard substance and uncertainty assessment. The standard substance has good stability under the storage condition of 0 DEG C, the certification method is accurate, the traceability is reliable, and the relative synthesis uncertainty is small(0.1%-0.3%). The standard substance can solve the problem that the current test method cannot perform quantity value tracing, and the standard substance can improve the comparison consistency of testresults of each unit, and fills the blank of development of the3-methylbenzophenone purity standard substance 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 3-methylbenzophenone purity standard substance used in various packaging materials and a preparation method thereof, which can be used as food packaging, Standard substance in testing of cigarette packs, workshop air monitoring, etc. 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 states...

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.