Automated determination of asulam by enhanced chemiluminescence using luminol/peroxidase system.
A flow injection system with chemiluminescence detection for the determination of asulam, enhancer of the system luminol-H(2)O(2)-horseradish peroxidase, is proposed. The method shows a moderate selectivity against other pesticides usually present in formulations of herbicides and in water. The procedure was applied to the determination of asulam in tap water samples and a recovery study was carried out in order to validate the method. The obtained results show acceptable recovery values (between 88.3 and 93.9%). The detection limit for asulam was 0.12 ng/mL. The precision of the method expressed as relative standard deviation was 1.55% (n = 8), at the 19 ng/mL level.
Sánchez
Francisco García
FG
Department of Analytical Chemistry, Faculty of Sciences. University of Málaga. Campus de Teatinos s/n. 29071 Málaga, Spain. f_garcia@uma.es
Díaz
Aurora Navas
AN
Bracho
Visitación
V
Aguilar
Alfonso
A
Algarra
Manuel
M
D001331:Automation; D002219:Carbamates / Q000032:analysis* / Q000737:chemistry; D005618:Fresh Water / Q000032:analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D008165:Luminol / Q000032:analysis / Q000737:chemistry*; D014881:Water Supply / Q000032:analysis*
D002219:Carbamates; C010036:asulam; D008165:Luminol; D006861:Hydrogen Peroxide