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Electrogenerated ferrate(VI) for CE–chemiluminescence detection to determine benzenediol isomers
Author(s) -
Li Fang,
Hu Yonggang,
Zhang Huijing,
Zhang Jie
Publication year - 2010
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200900511
Subject(s) - resorcinol , hydroquinone , chemistry , chemiluminescence , catechol , luminol , detection limit , electrochemistry , chromatography , nuclear chemistry , inorganic chemistry , organic chemistry , electrode
Based on the quenched chemiluminescence intensity of the luminol reaction sensitized by ferrate(VI) in alkaline medium, a novel CE with on‐line inhibited method for the simultaneous analysis of benzenediol isomers was developed. The ferrate(VI) solution was freshly prepared by electrochemical technique before electrophoresis. The parameters influencing detection and separation were carefully investigated. Baseline separation of benzenediols including catechol, resorcinol, and hydroquinone was achieved in less than 8 min with 5.0 mmol/L sodium tetraborate and 2.0 mmol/L luminol at an applied voltage of 18 kV. The LODs ( S / N =3) for catechol, resorcinol and hydroquinone were determined to be 8.5×10 −9 , 8.0×10 −7 and 6.5×10 −9 mol/L, respectively. Finally, the proposed method was applied for phenolic compounds in hair dye.