Sequential Injection Analysis with Square Wave Voltammetry (SI-SWV) Detection for Investigation of Adsorption of Picloram on a Clay Soil

Author(s)

dos Santos, Luciana B. O. ^[1] ; Masini, Jorge C. ^[2]

Affiliation

^[1] Univ Estadual Feira de Santana, Dept Exatas, BR-44036900 Feira De Santana, BA - Brazil

^[2] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 26, n. 10, p. 2063-2068, OCT 2015.
• Web of Science Citations: 1

Abstract

This paper describes a sequential injection analysis method, with detection by square wave voltammetry using a hanging mercury drop electrode, to determine the herbicide picloram in soil extracts (0.010 mol L-1 CaCl2). The method was applied for determination of the Freundlich parameters related to adsorption of picloram on a tropical soil sample. The major advantage of the proposed method over the conventional chromatographic methods is the high sampling throughput of 190 analyses per hour, with detection and quantification limits of 0.036 and 0.12 mg L-1, respectively. The K-f (0.0016 +/- 0.0005 mu mol(1-1/n) L-1/n kg(-1)) and 1/n (0.85 +/- 0.06) obtained by the proposed method did not differ from those determined by liquid chromatography with UV detection. (AU)

• FAPESP's process: 05/04286-0 - Analytical methodologies development for determination of organochlorines and organophosphates using electrochemical and chromatographic analysis techniques
• Grantee: Luciana Bagdeve de Oliveira dos Santos
• Support type: Scholarships in Brazil - Post-Doctorate