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Type: Artigo de periódico
Title: Glylphosate Determination In Soil, Water And Vegetables Using Dpv Optilmized By Response Surface Methodology
Author: Teofilo R.F.
Reis E.L.
Reis C.
da Silva G.A.
Paiva J.F.
Kubota L.T.
Abstract: A voltammetric procedure optimized by experimental design for glyphosate determination in soil, water and vegetable samples is described. The voltammetry experiments were performed using a hanging mercury drop electrode (HMDE). The DPV variables involved in the optimization process were: voltage step, pulse amplitude, pulse interval, voltage step time and concentration of the supporting electrolyte. A full 25 factorial design was chosen to evaluate these effects. From the results obtained by the factorial design the three most important factors were determined. These variables were evaluated with a central composite design. Under the optimized conditions, the operational range was from 0.050 to 100.0 mg dm-3 and the detection and quantification limits were 14 and 48 μg dm-3, respectively. The optimized method was successfully applied to glyphosate determination in soil, water and vegetables after purifying with an ion exchange resin and derivation.
Rights: fechado
Identifier DOI: 
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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