Instrumental advantages obtained with short controlled drop-time a.c. polarography

The performance of short drop-time a.c. polarography has been examined in detail, and found to be better than that for natural drop-times in almost every respect. Uncompensated resistance terms are smaller and potentiostat stability is improved. In addition, faster potential scanrates and more rapid data acquisition are possible. A variation of the drop-time over at least three orders of magnitude is possible and this, coupled with excellent instrumental performance, should offer considerable scope in studies of electrode kinetics.