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Article Dans Une Revue ACS Sensors Année : 2022

Amperometric Sensor for Selective On-Site Analysis of Free Sulfite in Wines

Résumé

Accurate and rapid on-site analysis of free SO 2 content is crucial in the process of winemaking from a producer and consumer perspective. Herein, we present an amperometric sensor based on commercially available screenprinted electrodes coupled with an electrochemical oxygen filter. The developed amperometric method gave a linear response in a concentration range up to 200 mg L −1 with a limit of quantification of 7.5 mg L −1. The applicability of the developed sensor was successfully tested on 27 white and red wine samples and compared to the Ripper method (iodometry) that is a standard procedure for free SO 2 determination. The sensor exhibits similar precision and accuracy but shows no interference from oxidizable species such as ascorbic acid, which is a major advantage over iodometric titration. The performance of the sensor was in addition positively evaluated during on-site analysis in a winery.
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Dates et versions

hal-03777506 , version 1 (18-11-2022)

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Július Gajdár, Grégoire Herzog, Mathieu Etienne. Amperometric Sensor for Selective On-Site Analysis of Free Sulfite in Wines. ACS Sensors, 2022, 7, pp.2209 - 2217. ⟨10.1021/acssensors.2c00611⟩. ⟨hal-03777506⟩
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