Quantitative Analysis of Prometrine Herbicide by Liquid-Liquid Extraction Procedures Coupled to Electrochemical Measurements

A.V. JUAREZ; L.M. YUDI

Wiley - VCH

Lugar: Weinheim; Año: 2009 vol. 21 p. 767 - 767

sensitive method is proposed for the preconcentration and quantification of the herbicide Prometrine (PROM) at a liquid-liquid interface employing square-wave voltammetry. The preconcentration stage was based on liquid-liquid extraction methodology and the PROM quantification was carried out from the peak current of square-wave voltammograms. Under the experimental conditions employed, linear calibration curves in the concentration range 1.0×10-6 M-5.0×10-5 M, with detection limit equal to 1.5×10-6 M were obtained without pretreatment of the samples. This linear range, as well as detection limit could be extended towards lower concentrations when a pretreatment procedure was employed. In this way, linearity of calibration curves between 8.0×10-8 M and 2.4×10-7 M and detection limit of 1.0×10-7 M, were observed. On the other hand, the standard addition method was also used as an alternative