Premium
Determination of carbofuran in pesticide formulations by flow injection spectrophotometry
Author(s) -
Zanella Renato,
Dallago Rogério M,
Preste Cristiane V
Publication year - 2000
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/1526-4998(200009)56:9<804::aid-ps194>3.0.co;2-l
Subject(s) - carbofuran , chromatography , chemistry , sodium hydroxide , detection limit , pesticide , calibration curve , organic chemistry , agronomy , biology
A flow injection spectrophotometric method for the determination of carbofuran in commercial pesticide formulations was developed. The determination involves on‐line hydrolysis of the extracted carbofuran at room temperature with sodium hydroxide. The resulting carbofuran‐phenol is coupled with diazotized 4‐aminobenzoic acid in order to achieve an appropriate selectivity and sensitivity for the spectrophotometric measurements. The calibration curve is linear over the range 1–10 mg litre −1 of carbofuran. The proposed method has a detection limit of 0.15 mg litre −1 of carbofuran and a sample frequency of 120 injections per hour. The relative standard deviation of six independent determinations of a sample containing 1 mg litre −1 carbofuran was 0.6%. The suitability of the proposed procedure for the determination of carbofuran in commercial pesticide formulations was studied. The procedure provides results comparable to those obtained by liquid chromatographic analysis. © 2000 Society of Chemical Industry