Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34844
標題: Determination of Thioglycolic Acid in Hair-Waving Products by Disposable Electrochemical Sensor Coupled with High-Performance Liquid Chromatography
作者: Zen, J.M.
曾志明
Yang, H.H.
Chiu, M.H.
Chen, Y.J.
Shih, Y.
關鍵字: uric-acid
derivatization
electrodes
oxidation
thiols
blood
期刊/報告no:: Journal of Aoac International, Volume 92, Issue 2, Page(s) 574-579.
摘要: A disposable electrochemical sensor coupled with high-performance liquid chromatography (HPLC) was developed for the determination of thioglycolic acid (TGA) in commercial hair-waving products. The quantitative determination of TGA was first investigated by using a preanodized ((star)) screen-printed carbon electrode (SPCE(star)). Because of the electrocatalytic effect of the SPCE(star), the peak potential (E(pa)) was shifted less positively as the current magnitude increased. HPLC was used in this study to eliminate interference from the matrix of real samples. The effects of various parameters, such as preanodization potential, preanodization time, solution pH, detection potential, and mobile phase, were studied in detail. Under optimized conditions, the linear range for TGA is up to 20 ppm, correlation coefficient (r(2)) = 0.998, with a detection limit of 0.042 ppm (signal-to-noise ratio = 3). The practical application of the proposed method was demonstrated by the determination of TGA concentration in commercial hair-waving products.
URI: http://hdl.handle.net/11455/34844
ISSN: 1060-3271
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