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Liquid chromatography amperometric detection of catechol, resorcinol, and hydroquinone with a copper‐based chemically modified electrode
Author(s) -
Zhou Jianxun,
Wang Erkang
Publication year - 1992
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/elan.1140040208
Subject(s) - hydroquinone , amperometry , resorcinol , catechol , copper , chemistry , electrode , analyte , detection limit , chromatography , detector , analytical chemistry (journal) , electrochemistry , organic chemistry , electrical engineering , engineering
A copper‐based chemically modified electrode (CME) has been constructed and characterized for flow‐through amperometric detection of catechol, resorcinol, and hydroquinone. Novel potential dependence of the detector response was first obtained for these analytes at the Cu CME, where negative peaks together with positive ones were observed in one definite chromatogram using amperometric detection. Its advantages in chromatographic applications were demonstrated. From these observations it is proposed that the detector response was governed by formation of copper complexes with the solutes. A dynamic linear range over two orders of magnitude was obtained, when operating the detector at +0.10 V vs. SCE, from which ng detection limits were achieved.