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Flow‐injection determination of carbaryl and carbofuran based on KMnO 4 –Na 2 SO 3 chemiluminescence detection
Author(s) -
Waseem Amir,
Yaqoob Mohammad,
Nabi Abdul
Publication year - 2007
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.970
Subject(s) - carbaryl , carbofuran , chemistry , chemiluminescence , detection limit , chromatography , diazinon , analytical chemistry (journal) , relative standard deviation , aldicarb , pesticide , agronomy , biology
A flow‐injection method is described for the determination of carbaryl and carbofuran. It was found that a strong chemiluminescence (CL) signal was generated when these pesticides were mixed with Na 2 SO 3 and KMnO 4 in acidic medium. Under the optimum experimental conditions, the enhanced CL intensity was linear, with the concentrations in the range 0.1–2.0 µg/mL ( r 2 = 0.9996 and 0.9993, n = 6) with relative standard deviation ( n = 4) in the range 1.0–2.3%. The limits of detection (3 σ blank) were 10 and 50 ng/mL, respectively, with a sample throughput of 180/h. The proposed method was applied to determine carbaryl and carbofuran in freshwaters with satisfactory results. Most metal and non‐metal ions and some pesticides, such as carbophenothion and aldicarb, do not interfere with the determination. Dinoseb, diazinon and malathion calibration graphs (in the range 0.2–2.0 µg/mL, r 2 = 0.9966–0.9988, n = 6) were also established with relative standard deviations ( n = 4) in the range 1.2–2.0% with limits of detection (3 σ blank) in the range 100–300 ng/mL. Copyright © 2007 John Wiley & Sons, Ltd.