Abstract
A rapid (less than 25 min) method for determination of total sulfur dioxide (SO<sub>2</sub>) in must or wine has been developed employing a Dionex 2010i ion chromatograph with anion exchange column and conductivity detector. A distillation step is avoided by diluting the filtered sample with 0.1 <i>N</i> NaOH:0.1% formaldehyde to an SO<sub>2</sub> level of 5 to 25 mg/L and eluting with a carbonate/bicarbonate buffer (pH 9.6). Recovery from sulfite-spiked must :samples by ion chromatography was 94% to 118%. High performance liquid chromatography-ion chromatography (HPLC-IC) analysis measured 83% to 110% total SO<sub>2</sub> compared to the official Modified Monier-Williams method, and the results were not significantly different (p < 0.01 ). With attention to sample dilution and detector attenuation, sulfate, tartrate, and malate can be determined simultaneously, making this a useful technique for following SO<sub>2</sub> throughout winemaking, cellar treatment, and storage, as well as characterizing acid profiles.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
