Multisyringe flow system: determination of sulfur dioxide in wines

M. A. Segundo, A. O. S. S. Rangel*, Andreu Cladera, V. Cerda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

A multisyringe flow system for the spectrophotomeric 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 1-1) 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.

Original languageEnglish
Pages (from-to)1501-1505
Number of pages5
JournalAnalyst
Volume125
Issue number8
DOIs
Publication statusPublished - 1 Jan 2000

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