构建了一种基于荧光“关闭”的上转换测试纸，用于灵敏和选择性地检测口红中的致癌染料苏丹红 III。
An up-conversion test paper based on "switch-off" of fluorescence is constructed to sensitively and selectively detect cancer-causing dye Sudan III in lipstick.
机构信息
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, China.
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Nov 5;280:121515. doi: 10.1016/j.saa.2022.121515. Epub 2022 Jun 16.
Cancer-causing dye Sudan III is banned adding to cosmetics, so a method for detecting trace Sudan III in cosmetics is established. A single dispersed up-conversion molecularly imprinted fluorescent nanoprobe is constructed and coated on the filter paper. The mechanism for detecting Sudan III by this composite fluorescent nanoprobes-paper is systematically analyzed. The fluorescent response (max emission peak is at 541 nm) is linearly related to 10-1000 nM Sudan III, and Sudan III can be selectively recognized (imprinting factor increased to 4.1). The limit of detection and quantitation are further reduced to 2.89 nM and 9.63 nM, respectively. The recoveries of Sudan III in lipstick samples are between 93.18 and 108.3%, and relative standard deviation is less than or equal to 4.6%. Trace Sudan III in cosmetics are detected accurately and sensitively by this method due to up-conversion nanoparticles with little interference of background fluorescence and molecularly imprinted polymers with selective enrichment.
致癌染料苏丹红 III 被禁止添加到化妆品中，因此建立了一种检测化妆品中痕量苏丹红 III 的方法。构建并涂覆在滤纸上的是一种单分散上转换分子印迹荧光纳米探针。系统分析了这种复合荧光纳米探针-纸检测苏丹红 III 的机制。荧光响应（最大发射峰位于 541nm）与 10-1000nM 苏丹红 III 呈线性关系，并且苏丹红 III 可以被选择性识别（印迹因子增加到 4.1）。检测限和定量限分别进一步降低至 2.89nM 和 9.63nM。口红样品中苏丹红 III 的回收率在 93.18%至 108.3%之间，相对标准偏差小于或等于 4.6%。由于上转换纳米粒子背景荧光干扰小，分子印迹聚合物选择性富集，该方法能准确、灵敏地检测化妆品中的痕量苏丹红 III。
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