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Potential of the luminol reaction in the sensitive detection of pesticide residues by flow injection analysis
Author(s) -
HuertasPérez José Fernando,
GarcíaCampaña Ana M.,
GonzálezCasado Antonio,
GámizGracia Laura
Publication year - 2004
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.776
Subject(s) - luminol , chemiluminescence , carbaryl , potassium permanganate , chemistry , detection limit , carbamate , chromatography , permanganate , dichlorvos , pesticide , organic chemistry , agronomy , biology
This study presents the rst analytical application of the luminol chemiluminescence (CL) reaction for the sensitive detection of carbamate residues. Some experiments have been carried out to check the inuence of the presence of traces of a N‐methylcarbamate (carbaryl) on the CL emission produced from the oxidation of luminol using different oxidants, showing a signicant enhancing effect on the CL emission when the oxidation of luminol is produced by potassium permanganate in alkaline medium, this enhancement being proportional to the carbaryl concentration. This fact has permitted the establishment of a sensitive chemiluminescence ow‐injection (CL‐FIA) method for the direct determination of carbaryl. The optimization of instrumental and chemical variables inuencing the CL response has been carried out by applying experimental designs. Under the optimal conditions, the CL intensity was linear for a carbaryl concentration over the range 5–100 ng/mL with a detection limit of 4.9 ng/mL. This luminol–KMnO 4 ‐based FIA‐CL system in basic medium shows an easy, fast and cheap alternative detection mode for the analysis of carbaryl residues in environmental water samples. Copyright © 2004 John Wiley & Sons, Ltd.