Free sulphite determination in wine using screen-printed carbon electrodes with prior gas-diffusion microextraction

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Ramos, RM (Author) FCUP; Goncalves, LM (Author) Other; Vyskocil, V (Author) Other; Rodrigues, JA (Author) FCUP

Journal

Title: Electrochemistry Communications

Vol. 63

Pages: 52-55

ISSN: 1388-2481

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 35 Citations

Scopus - 35 Citations

Other information

Authenticus ID: P-00K-273

DOI: 10.1016/j.elecom.2015.12.010

Abstract (EN): Gas-diffusion microextraction was employed in the extraction of sulphites in wines aiming their electrochemical determination, which was achieved by square-wave voltammetry using screen-printed carbon electrodes. Sulphites are additives commonly used in many produced goods, particularly food products. The developed methodology showed good limits of detection (0.4 mg L-1) and quantification (1.3 mg L-1). The proposed method was also compared with the reference methodology used by the wine industry (the Ripper method, an iodometry) showing no significant differences in the obtained results. Therefore, a simple, cheap and portable alternative for the determination of sulphites in wine is presented.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4