Aanalysis method of residual quantities of eighteen photoinitiators in ultra violet (UV) printing ink

An analysis method of residual quantities of eighteen photoinitiators in ultra violet (UV) printing ink aims to determine the residual quantities of the eighteen photoinitiators including 2-hydroxy-2-methyl-1-phenylpropanone, methyl benzoylformate, diphenyl ketone and the like. The analysis method is characterized by mainly comprising the following steps: 1) preparation of a test sample, 2) extraction of a sample, 3) dispersive solid phase extraction purification, 4) preparation of standard working solutions, 5) instrument analysis and 6) result calculating. According to the analysis method, through sample pretreatment and optimization and validation by instrument analysis, a sample pretreatment technology of dispersive solid phase extraction purification is applied to the determination of the residual quantities of the photoinitiators in the UV printing ink sample, and compared with a liquid-liquid extraction (LLE) technology and a solid phase extraction (SPE) technology adopted by related methods in the prior art, the analysis method has the characteristics of being rapid, simple, cheap, effective, reliable and safe. So far, the analysis method covers most kinds of residual photoinitiators than analysis methods at home and abroad.