Determination of starane (fluroxypyr) herbicide using flow injection spectrophotometry.
The starane herbicide was spectrophotometrically determined by the diazotization method in a flow injection assembly. Since starane is a substituted pyridyl compound the NH2 group at the p-position was exploited for diazotization. Starane was diazotized with nitrite and the diazotized product is coupled with beta-naphthol. The absorbance of the resulting azo dye was measured at 395 nm with a molar absorptivity of 1.5 x 10(4) L mol(-1) cm(-1). The calibration graph was linear over the range of 0.6 to 10 microg/mL, with a relative standard deviation (RSD) of 1.67% and a sampling through put of 60 samples h(-1). The % recovery for the determination of starane was found to be 96%. The method was successfully applied to the determination of the active ingredient of starane herbicide in its formulation as well as in food samples.
Shah
Jasmin
J
Department of Chemistry, University of Peshawar, N.W.F.P., Pakistan. jasminshah2001@yahoo.com
Jan
M Rasul
MR
Bashir
Nadia
N
D000085:Acetates / Q000032:analysis*; D002138:Calibration; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods; D006540:Herbicides / Q000032:analysis*; D015394:Molecular Structure; D011725:Pyridines / Q000032:analysis*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000295:instrumentation / Q000379:methods
D000085:Acetates; D006540:Herbicides; D011725:Pyridines; C416382:4,5-amino-3,5-dichloro-6-fluoro-2-pyridinyloxyacetic acid