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Voltammetric Determination of Kojic Acid in Cosmetic Bleaching Products Using a Disposable Screen‐Printed Carbon Electrode
Author(s) -
Shih Ying,
Zen JyhMyng
Publication year - 1999
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(199904)11:4<229::aid-elan229>3.0.co;2-g
Subject(s) - kojic acid , electrode , carbon paste electrode , detection limit , square wave , voltammetry , chemistry , linear range , carbon fibers , materials science , chromatography , cyclic voltammetry , electrochemistry , organic chemistry , voltage , composite material , tyrosinase , enzyme , physics , quantum mechanics , composite number
A preanodized screen‐printed carbon electrode is used for the determination of kojic acid in cosmetic bleaching products by square‐wave voltammetry. The preanodization process leads to a marked enhancement of the current response of kojic acid at the screen‐printed carbon electrode. The linear range is up to 260 μM in pH 10 Britton‐Robinson buffer with a detection limit ( S / N =3) of 0.17 μM. The electrode has the advantages of low cost, of being easy to handle, and it can be either disposable or reused since the renewal gives a reproducible surface. Quantitative analysis for the kojic acid content in cosmetic products was performed by the standard addition method.