Sensitive voltammetric method for determination of herbicide triasulfuron using silver solid amalgam electrode

Voltammetric behavior of triasulfuron (TS), sulfonylurea herbicide, was investigated using mercury meniscus modified silver solid amalgam electrode (m-AgSAE) and hanging mercury drop electrode (HMDE). It was found that TS provided one well-developed reduction peak and the highest current response was recorded in Britton-Robinson buffer of pH 3 (m-AgSAE) and 2.5 (HMDE), respectively. Differential-pulse voltammetry (DPV) with optimized working parameters was applied for analysis of model solutions containing TS with good sensitivity (LD(m-AgSAE) = 6.4 × 10−8 mol L−1 and LD(HMDE) = 2.7 × 10−9 mol L−1, respectively). Proposed method was successfully applied in analysis of herbicide preparation and river water.