Simultaneous Determination of Ethanethiol, Inorganic Sulfide, and Sulfite in Wines by Cathodic Stripping Voltammetry

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• 作者：Ananda Guarda ; Juliana Villela Maciel ; Bruna Avila Wiethan…
• 关键词：Ethanethiol ; Inorganic sulfide ; Sulfite ; Voltammetry ; Wine
• 刊名：Food Analytical Methods
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：10
• 期：3
• 页码：837-844
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Food Science; Chemistry/Food Science, general; Microbiology; Analytical Chemistry;
• 出版者：Springer US
• ISSN：1936-976X
• 卷排序：10

文摘

This paper deals with the simultaneous determination of ethanethiol, inorganic sulfide, and sulfite in wines using cathodic stripping voltammetry. Under the optimized experimental conditions, a linear response to ethanethiol (0.2 to 0.6 mg L−1), inorganic sulfide (0.016 to 0.048 mg L−1), and sulfite (1.5 to 4.5 mg L−1) were obtained with correlation values R2 above 0.985. A detection limit of 0.3, 0.2, and 10 μg L−1 was obtained to ethanethiol, inorganic sulfide, and sulfite, respectively. The recovery values obtained were between 78 and 104 % to ethanethiol, 88 and 108 % to inorganic sulfide, and 87 and 102 % to sulfite. The highest levels of ethanethiol, inorganic sulfide, and sulfite obtained in the samples were 4.85, 0.44, and 44.72 mg L−1, respectively. Besides, this method does not suffer interference from other compounds naturally present in the samples, and it enables fast and reliable determination of these sulfur compounds in wines, with minimal sample pretreatment.