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Design of a Flow-Through Voltammetric Sensor Based on an Antimony-Modified Silver Electrode for Determining Lithol Rubine B in Cosmetics

机译:基于锑修饰银电极的流动伏安伏安法测定化妆品中的酚红B的设计

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摘要

Lithol Rubine B (LRB; the disodium salt of 3-hydroxy-4-[(4-methyl-2-sulfophenyl) azo]-2-naphthalenecarboxylic acid) was detected using high-performance liquid chromatography with an electrochemical (antimony film on silver) detector (HPLC-ECD). For direct current (DC) mode, with the current at a constant potential, and measurements with suitable experimental parameters, a linear concentration from 0.125 to 1.80 μg/mL was found. The detection limit of our method was approximately 2.0 ng/mL. An antimony-modified silver detector was used to demonstrate that LRB is electrochemically reduced in acidic media and to analyze commercial cosmetics to determine their LRB content. Findings using HPLC-ECD and HPLC with an ultraviolet detector were comparable.
机译:使用高效液相色谱仪,通过电化学方法(银上的锑膜),检测了甲醇红宝石B(LRB; 3-羟基-4-[(4-甲基-2-磺苯基)偶氮] -2-萘甲酸的二钠盐) )检测器(HPLC-ECD)。对于直流(DC)模式,在恒定电势下进行电流,并通过适当的实验参数进行测量,发现线性浓度为0.125至1.80μg/ mL。我们方法的检出限约为2.0μng/ mL。使用锑改性的银检测器来证明LRB在酸性介质中被电化学还原,并用于分析商业化妆品以确定其LRB含量。使用HPLC-ECD和带紫外检测器的HPLC的结果可比。

著录项

  • 作者

    Lai-Hao, Wang; Shu-Juan, Huang;

  • 作者单位
  • 年度 2011
  • 总页数
  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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