Analysis of methylparaben in cosmetics based on a chemiluminescence H2O2−NaIO4−CNQDs system
Analysis of methylparaben in cosmetics based on a chemiluminescence H2O2−NaIO4−CNQDs system
复制标题
基于化学发光H2O2→NaIO4→CNQDs系统分析化妆品中的对羟基苯甲酸甲酯
DOI：
10.1002/bio.3922
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发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
Xianglei Cheng
中科院分区：
文献类型：
--
作者：
Jie Li;Yingzi Han;Xinyue Li;Liping Xiong;Lijun Wei;Xianglei Cheng
本文基于IO 4 −-H2 O2-碳氮量子点（CNQDs）体系，建立了一种简便、有效的化学发光（CL）检测化妆品中对羟基苯甲酸甲酯（MP）的方法。结果表明，在碳酸氢根存在下，高碘酸盐与过氧化氢发生氧化还原反应，释放出羟基自由基和超氧阴离子自由基。这两个自由基负责形成最大波长为480 nm的激发发光体CNQD*。由于与氢氧自由基的竞争反应，MP存在时CL强度显着减弱。日内测定的相对标准偏差小于5.5%（n= 9），检出限低至0.50 μmol/L。所提出的方法允许成功的，选择性地测定化妆品中的MP。
In this article, a simple, effective chemiluminescence (CL) method for the detection of methylparaben (MP) in cosmetic samples was developed based on an IO4−–H2O2–carbon nitrogen quantum dots (CNQDs) system without a separation process. The results indicated that the redox reaction between periodate and hydrogen peroxide released hydroxide radicals and superoxide radical anions in the presence of bicarbonate. These two radicals were responsible for the formation of excited luminophor CNQD* with a maximum wavelength at 480 nm. Due to the competitive reaction with hydroxide radicals, CL intensity was markedly diminished in the presence of MP. The relative standard deviation in the intraday assay was below 5.5% (n= 9), and the detection limit was as low as 0.50 μmol/L. The proposed method allowed for the successful, selective determination of MP in cosmetics.