Analysis of Diquat by Ion Selective Elecrodes

Abstract
The calibration response of a diquat bis(tetra-4-chlorophenylborate) (DQT.2T4C1PB) based ISE for DQT was stable for 55 days. The ISE calibration slope and minimum detectable activity a (min) of DQT were in the ranges (S.D. in parentheses) 30(0.6) to 28(1.7) mV/log a(DQT) and 4(3) .times. 10-9M to 3(0.2) .times. 10-6 M, respectively.