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Investigation on the interaction between dihydroxybenzene and Fe 3+ –H 2 O 2 –Rh6G system based on enhancing chemiluminescence
Author(s) -
He Deyong,
Zhang Zhujun,
He Chao
Publication year - 2005
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.875
Subject(s) - chemiluminescence , hydroquinone , chemistry , resorcinol , detection limit , catechol , hydroxyl radical , rhodamine 6g , inorganic chemistry , radical , photochemistry , nuclear chemistry , organic chemistry , chromatography , molecule
A highly sensitive flow‐injection chemiluminescence (FI–CL) method has been developed for the determination of dihydroxybenzene, based on the hydroxyl radical reaction. Hydroxyl radical (·OH) produced by the reaction of Fe 3+ and H 2 O 2 oxidize rhodamine 6G to produce weak CL. It was observed that catechol and hydroquinone greatly enhanced the weak CL reaction. However, the proposed CL system is not suitable for determination of resorcinol because the enhancement reaction is very slow. The proposed procedure has a linear range of 0.01–2 mg/L for catechol, with a detection limit of 0.006 mg/L, and 0.008–1 mg/L for hydroquinone, with a detection limit of 0.004 mg/L. The possible mechanism of the CL system is discussed. Copyright © 2005 John Wiley & Sons, Ltd.