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

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標題:	Design of a Flow-Through Voltammetric Sensor Based on an Antimony-Modified Silver Electrode for Determining Lithol Rubine B in Cosmetics
作者:	Wang, Lai-Hao Huang, Shu-Juan
貢獻者:	醫藥化學系
日期:	2011-04
上傳時間:	2013-10-23 15:21:16 (UTC+8)
出版者:	Hindawi Publishing Corporation
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.
關聯:	Journal of Automated Methods and Management in Chemistry, 2011(ID 896978 ), pp.1-7
显示于类别:	[食藥產業暨檢測科技系(含五專)] 期刊論文

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