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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidade Estadual Paulista Júlio de Mesquita Filho
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=42932205 |
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Table of Contents:
- Evaluation of a carbon paste electrode modified with organofunctionalised SBA-15 silica in the determination of copper I. Cesarino G. Marino J.R. Matos E. T. G. Cavalheiro Química SBA Copper(II) Benzothiazolethiol Carbon paste electrode 15 nanostructured silica The performance of a carbon paste electrode (CPE) modified with SBA-15 nanostructuredsilica organofunctionalised with 2-benzothiazolethiol for determination of Cu(II) ions in sugar cane spirit(cachaça) is described, based on differential pulse anodic stripping voltammetry (DPASV) procedure.The Cu(II) oxidation peak was observed at 0.03 V (vs. SCE) in phosphate solution (pH 3.0). The resultswere obtained using optimised conditions such as 100 mV pulse amplitude, 3 min accumulation time, 25mV s-1 scan rate in phosphate solution pH 3.0, resulting in a linear dynamic range from 8.0 x 10-7 to 1.0 x10-5 mol L-1 Cu(II) and a limit of detection 2.0 x10-7 mol L-1. Cu(II) spiked in a cachaça sample wasdetermined with 102.5 % mean recovery at mmol L-1 level. Interference from other metallic cations presentin the sample was avoided by the standard addition procedure. 2007 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42932205 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.2 Vol.32