曲拉通X-100增敏紫外分光光度法测定化妆品中对苯二酚  

Determination of Residual Hydroquinone in Cosmetics by Qulatong X-100 Sensitized UV Spectrophotometry

作　　者：白莹 陆碧艳 董娜 张小林 姚彦红 张爱菊 BAI Ying;LU Biyan;DONG Na;ZHANG Xiaolin;YAO Yanhong;ZHANG Aiju(Gansu Medical College,Pingliang 744000,China)

机构地区：[1]甘肃医学院,甘肃平凉774000

出　　处：《云南化工》2025年第4期69-71,共3页Yunnan Chemical Technology

基　　金：甘肃医学院“院(系)主任负责制项目”(GY-2023FZZ06)。

摘　　要：基于表面活性剂曲拉通X-100增敏下的碘液紫外光谱特性,构建了一种简便灵敏的测定化妆品中对苯二酚含量的新方法。碘在紫外光区284 nm、352 nm处有最大吸收峰,非离子表面活性剂曲拉通X-100对其光吸收有增敏性。对苯二酚还原碘,吸光度随之变小,ΔA与对苯二酚浓度相关联。280 nm波长处存在对苯二酚标准曲线方程:ΔA=6.986 c-0.0156,相关系数r=0.9978,检测范围为6.00×10^(-6)~1.20×10^(-4) mol/L,最低检测限达到2.15×10^(-6) mol/L。紫外法显著提升了对苯二酚检测的准确度和灵敏性,操作简便,安全环保,样品分析相对标准偏差RSD小于3%。新方法用于化妆品中对苯二酚快速检测,结果与文献报道方法一致。An indirect UV detection method for hydroquinone in cosmetics was established based on the UV spectral characteristics of iodine solution sensitized with surfactant Triton X-100.Iodine had maximum absorption peaks at 284 nm and 352 nm in the ultraviolet light region,and the non ionic surfactant Triton X-100 had sensitization to its light absorption.When hydroquinone reduces iodine,the absorbance decreases accordingly,and ΔA is correlated with the concentration of hydroquinone.The standard curve equation for hydroquinone at a wavelength of 280nm was:ΔA=6.986 c(mmol/L)-0.0156,correlation coefficient r=0.9978.The detection range was 6.00×10^(-6)-1.20×10^(-4) mol/L and detection limit was 2.15×10^(-6) mol/L.The UV method significantly improved the accuracy and sensitivity of hydroquinone detection,with simple operation,safety and environmental protection.The relative standard deviation(RSD)of sample analysis was less than 3%.The method could be used for the rapid determination of hydroquinone in cosmetics,and the detection results were with those reported in the literature.

关 键 词：对苯二酚 间接紫外法 碘 曲拉通X-100 化妆品 

分 类 号：O657.31[理学—分析化学] X832[理学—化学]