期刊
ELECTROPHORESIS
卷 36, 期 20, 页码 2530-2537出版社
WILEY
DOI: 10.1002/elps.201500004
关键词
Benzophenone-type ultraviolet filters; Double dispersant-assisted extraction; Ionic liquid liquid-liquid microextraction; Micellar electrokinetic chromatography; Sunscreen cosmetic product
资金
- State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences
In this work, double dispersant-assisted ionic liquid dispersive liquid-liquid microextraction coupled with micellar electrokinetic chromatography was developed to determine four UV filters (benzophenone, 4-hydroxybenzophenone, 2,4-dihydroxybenzophenone, and 2-hydroxy-4-methoxybenzophenone). 1-Hexyl-3-methylimidazolium hexafluorophosphate was used as the extraction solvent. The main novelty of the present work was that acetonitrile-Triton X-114 was used as double disperser solvent. Parameters affected the extraction efficiency were investigated and optimized. Under the optimum conditions, enrichment factors were in the range of 25.3-40.5. The limits of detection and quantitation, calculated at a S/N of three and ten, were 3.9-6.7 ng/mL and 13.0-22.3 ng/mL. The linearity of the method was in the range of 0.02-2 mu g/mL for 2, 4-dihydroxybenzophenone and 4-hydroxybenzophenone, 0.01-2 mu g/mL for benzophenone and 2-hydroxy-4-methoxybenzophenone, with correlation coefficient (R-2) of 0.9984-0.9991. The proposed method was successfully applied to the determination of four benzophenone-type UV filters in six kinds of sunscreen cosmetic products, with yielded relative recoveries ranging from 80.2 to 117.7%.
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