An improved solid-state perchlorate-selective electrode

A solid-state perchlorate sensitive electrode, based upon a radical-ion salt derived from N-ethylbenzothiazole-2,2'-azine. has been prepared. Its response characteristics and high apparent selectivity for perchlorate over many common anions show marked improvements with respect to similar systems which were studied earlier. The general electrode properties observed suggest that it may be considered an acceptable practical alternative to existing liquid-membrane sensors for perchlorate.