Determination of Dinoseb by adsorptive stripping voltammetry

Abstract

Abstract A sensitive method is described for the determination of Dinoseb (2‐ sec ‐butyl‐4, 6‐dinitrophenol) at nanomolar levels by adsorptive stripping voltammetry (AdSV) at the hanging mercury drop electrode. Cyclic voltammetry studies showed two well‐defined reduction peaks, at −0.21 and −0.36 V, and demonstrated the adsorption of Dinoseb and its intermediate reduction product on the electrode. A systematic study of the experimental parameters that affect the stripping response was carried out using differential pulse voltammetry. Using a 120 second adsorption time, the limits of determination and detection were 1.5 × 10 −9 and 4.6 × 10 −10 M, respectively, and the relative standard deviation ( n = 10) was 3.9% at a concentration level of 6.0 × 10 −9 M.