Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3031
Título: Maltol determination in food by microwave assisted extraction and electrochemical detection
Autor: Barroso, M. Fátima
Sales, M. Goreti F.
Almeida, Sofia A. A.
Vaz, M. Carmo V. F.
Delerue-Matos, Cristina
Palavras-chave: Foods
Electroanalytical methods
Hanging mercury drop electrode
Food additive
Microwave-assisted extraction
Data: 2008
Editora: Elsevier
Relatório da Série N.º: Journal of Food and Drug Analysis; Vol. 16, Issue 4
Resumo: An electrochemical method is proposed for the determination of maltol in food. Microwave-assisted extraction procedures were developed to assist sample pre-treating steps. Experiments carried out in cyclic voltammetry showed an irreversible and adsorption controlled reduction of maltol. A cathodic peak was observed at -1.0 V for a Hanging Mercury Drop Electrode versus an AgCl/Ag (in saturated KCl), and the peak potential was pH independent. Square wave voltammetric procedures were selected to plot calibration curves. These procedures were carried out with the optimum conditions: pH 6.5; frequency 50 Hz; deposition potential 0.6 V; and deposition time 10 s. A linear behaviour was observed within 5.0 × 10-8 and 3.5 × 10-7 M. The proposed method was applied to the analysis of cakes, and results were compared with those obtained by an independent method. The voltammetric procedure was proven suitable for the analysis of cakes and provided environmental and economical advantages, including reduced toxicity and volume of effluents and decreased consumption of reagents.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3031
ISSN: 1021-9498
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