Development of highly sensitive electrochemical measurement on dry chemistry measuring electrode potential shift

作者：Arimoto Satoshi^*; Kamei Akihito; Yasukawa Tomoyuki; Mizutani Fumio; Yoshioka Toshihiko

来源：Electrochimica Acta, 2013, 108: 776-780.

DOI：10.1016/j.electacta.2013.07.024

• High sensitivity
• Substitutional stripping voltammetry
• Ionic liquid
• Dry chemistry
• Electrode potential shift

Based on the substitutional stripping voltammetry (SSV) that is a highly sensitive electrochemical measurement, we have developed a new measurement system employing a gel made from hydrophobic ionic liquid and polymer. Since a salt bridge and an auxiliary electrochemical solution were necessary to conduct SSV, the conventional measurement system was somewhat complicated. The problem has hindered the application of SSV in compact chemical sensors. A gel coating on the silver electrode could replace both the salt bridge and the auxiliary electrochemical solution. As a result, all electrodes for SSV could be prepared on a planar substrate and the amount of the sample solution was enormously reduced to only 30 mu l. The conventional SSV consists of two electrochemical steps: pre-electrolysis and stripping. In order to shorten the duration of measurement, the potential shifts of the auxiliary electrode were monitored before and after the pre-electrolysis to skip stripping, maintaining the sensitivity equivalent to the conventional SSV.

• 出版日期2013-10-1