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Cathodic stripping voltammetric determination of arsenic in sugarcane brandy at a modified carbon nanotube paste electrode
- Source :
- LOCUS Repositório Institucional da UFV, Universidade Federal de Viçosa (UFV), instacron:UFV, Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual), Universidade de São Paulo (USP), instacron:USP
- Publication Year :
- 2012
-
Abstract
- We have developed an eletroanalytical method that employs Cu 2+ solutions to determine arsenic in sugarcane brandy using an electrode consisting of carbon paste modified with carbon nanotubes (CNTPE) and polymeric resins. We used linear sweep (LSV) and differential-pulse (DPV) voltammetry with cathodic stripping for CNTPE containing mineral oil or silicone as binder. The analytical curves were linear from 30 to 110 μg L −1 and from 10 to 110 μg L −1 for LSV and DPV, respectively. The limits of detection (L.O.D.) and quantification (L.O.Q.) of CNTPE were 10.3 and 34.5 μg L −1 for mineral oil and 3.4 and 11.2 μg L −1 for silicone. We applied this method to determine arsenic in five commercial sugarcane brandy samples. The results agreed well with those obtained by hydride generation combined with atomic absorption spectrometry (HG AAS).
- Subjects :
- Carbon paste electrode
Materials science
Stripping (chemistry)
NANOTECNOLOGIA
Analytical chemistry
chemistry.chemical_element
Multi-walled carbon nanotubes
Food Contamination
Carbon nanotube
Analytical Chemistry
law.invention
Arsenic
law
Limit of Detection
Electrochemistry
Voltammetry
Electrodes
Detection limit
Nanotubes, Carbon
Alcoholic Beverages
General Medicine
Sugarcane brandy
Saccharum
chemistry
Adsorption
Atomic absorption spectroscopy
Carbon
Food Science
Nuclear chemistry
Subjects
Details
- ISSN :
- 18737072
- Volume :
- 154
- Database :
- OpenAIRE
- Journal :
- Food chemistry
- Accession number :
- edsair.doi.dedup.....9c637765e858b75668000a1991ad43c1