Total anodic voltammetric waves of undiluted dimethylsulfoxide at Pt microelectrodes

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Abstract
At least two total anodic voltammetric waves of DMSO, or voltammetric waves of undiluted DMSO, can be obtained at platinum microelectrodes. These waves are of roughly equal height. Linear scan‐ and reverse pulse voltammograms indicate that the first wave is a one‐electron wave. After the addition of water the formation of dimethylsulfone is possible and therefore a part of DMSO equivalent to water concentration is oxidized via the two‐electron process. This results in an increase of the wave height and can be used for analytical purposes. To determine water content, by using this increase, its concentration in DMSO should be higher than 0.1 mol/L.