TOTAL ANODIC VOLTAMMETRIC WAVES OF UNDILUTED DIMETHYLSULFOXIDE AT PT MICROELECTRODES

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 puls e voltammograms indicate that the first wave is a one-electron wave. A fter the addition of water the formation of dimethylsulfone is possibl e and therefore a part of DMSO equivalent to water concentration is ox idized via the two-electron process. This results in an increase of th e wave height and can be used for analytical purposes. To determine wa ter content, by using this increase, its concentration in DMSO should be higher than 0.1 mol/L.