Trace analysis of 1,10-phenanthroline based herbicide in water and soil samples.
A sensitive analytical procedure for diquat herbicide viz. 5,6-dihydropyrazino[1,2,3,4-lmn]-1,10-phenanthrolinium dichlorides in drinking water and soil samples, using differential pulse adsorptive stripping voltammetry (DPAdSV) has been developed. This involved the adsorptive accumulation of a diquat herbicide onto a hanging mercury drop electrode [accumulation potential -0.8 V vs Ag/AgCl, accumulation time 60 s, pH 7.0, ionic strength 0.1 M] for DPAdSV measurement. The detection limit for diquat herbicide was as low as 0.034 micromol L(-1) level (S/N 2, RSD 2.9%) at an accumulation time of 60 s.
Prasad
Bhim Bali
BB
Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi-221 005, India. prasadbb_2000@yahoo.com
Arora
Bhavana
B
D004563:Electrochemistry; D006540:Herbicides / Q000032:analysis*; D006801:Humans; D010618:Phenanthrolines / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D006540:Herbicides; D010618:Phenanthrolines; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical