Voltammetry with microelectrodes in wine: determination of the total acidity

✍ Scribed by M.Antonietta Baldo; Salvatore Daniele; Gian A. Mazzocchin

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 760 KB
• Volume: 272
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)80387-z

✦ Synopsis

A voltammetnc study of wme was performed m order to ascertain Its sultabdlty as a medmm for analysts The electrochenueal processes of the probe molecule Ru(NH,)&l, and of some electroactwe species present m the medmm were mvestlgated unth a platinum nucroelectrode and the relevant responses were compared with those obtamed urlth an electrode of the same matenal of conventIona size The results mdaxted that urlth the latter electrode ohnuc losses affect the voltammetnc processes, whereas no problem anses wth the nucroelectrode It was also found that the acids present m wme are responsible for a large cathodic wave and its measurement, by voltammemc and chronoamerometnc tltratlons, penmtted the determmahon of the total acldlty of wme \Irlth a relatrve standard devlatlon wrthm 2 5% The results obtamed \mth this approach were compared with those obtamed by the classIcal method commonly employed for the determmatlon of the total tltratable acldlty of wme