Multisyringe flow system: determination of sulfur dioxide in wines

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Segundo, MA (Author) Other; Rangel, AOSS (Author) Other; Cladera, A (Author) Other; Cerda, V (Author) Other

Journal

Title: The Analyst

Vol. 125

Pages: 1501-1505

ISSN: 0003-2654

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 46 Citations

Scopus - 53 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-001-144

DOI: 10.1039/b002225j

Abstract (EN): A multisyringe flow system for the spectrophotometric determination of sulfur dioxide in wines is described. The methodology is based on the well-known reaction among SO2, formaldehyde and pararosaniline. The proposed manifold also includes a gas diffusion unit in order to prevent the colour interference of red wines in the spectrophotometric measurement. The proposed method was successfully applied to the determination of free SO2 (2-75 mg l(-1)) and total SO2 (10-250 mg l(-1)) in wines, just by changing a few operating parameters in the controlling software. A sampling-rate of 25-30 samples per hour was achieved with good repeatability for 10 consecutive injections of wine samples (RSD < 3.2%). The results obtained from 10 wine samples for each determination were statistically comparable to those obtained by the recommended procedure.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5