Voltammetric determination of the insecticide buprofezin in soil and water

A sensitive method for the determination of the insect growth regulator bup rofezin (Bup) at nanomolar level by adsorptive stripping voltammetry (ASV) at a hanging mercury drop electrode (HMDE) was described. The cyclic voltam mograms demonstrate the adsorption of this compound at the mercury electrod e. A systematic study of the various operational parameters that affect the stripping response was carried out by differential pulse voltammetry. With an accumulation potential of -0.8 V and a 60 s accumulation time, the limi t of detection was 2.2 mug l(-1) (7.21 x 10(-9) mol l(-1)), and the relativ e standard deviation (n = 5) was 3.4% at concentration level of 5.0 x 10(-7 ) mol l(-1) Bup. The degree of interference from diverse ions and some othe r pesticides on the differential pulse stripping signal for Bup was evaluat ed. Finally, the method was applied for determination of Bup in spiked soil , tap water, and treated wastewater. (C) 2001 Elsevier Science B.V. All rig hts reserved.