Photoinitiator mixed solution standard substance and preparation method thereof

Abstract

A photoinitiator mixed solution standard material and a preparing method thereof are disclosed. The standard material is a standard solution containing 18 photoinitiators, with the definite concentration value and corresponding combined standard uncertainty of each photoinitiator meeting related standard requirements. The method includes (1) purifying 18 photoinitiator crude products; (2) evaluating definite values and uncertainty of the purified products; (3) preparing a mixed solution standard of the 18 photoinitiators; and (4) evaluating definite values and uncertainty of the mixed solutionstandard material of the 18 photoinitiators. The photoinitiator mixed solution standard has good stability during storage at 0 DEG C, a definite value evaluating method is accurate, source tracing isreliable, and relative combined uncertainty is low (0.5-2.0%). The photoinitiator mixed solution standard material can overcome a problem that testing methods at present cannot achieve metrological traceability, increases comparison consistency of each unit testing result, and fills the gap of development of photoinitiator mixed solution standard materials at home and abroad.

Description

technical field [0001] The invention relates to the technical field of measurement and test standard value transfer, in particular to a photoinitiator mixed solution standard substance and a preparation method thereof, which can be used for the analysis and testing of photoinitiators in various packaging materials, and can be used as food packaging, cigarette case Standard substances in testing of packaging, workshop air monitoring, etc. Background technique [0002] UV printing is a printing process in which the ink is dried and cured by ultraviolet light, and the ink containing a photoinitiator needs to be matched with a UV curing lamp. At present, this process is widely used in the printing of paper packaging materials. Research in recent years has 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 EU's "Re...

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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 purity standard materials and mixed solution standard materials in China, and there are no related reports abroad, and the development of photoinitiator-related standard materials is in a blank state

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