Coated-wire lithium ion-selective electrodes based on polyalkoxylate complexes

Authors:
Publisher website
Google Scholar
Abstract
Barium and lithium adducts of polyalkoxylates have been investigated as sensors in lithium ion-selective electrodes using a microconduit flow injection analysis system. Dioctyl phenylphosphonate (DOPP) and dioctyl 3-nitrophenylphosphonate (N-DOPP) were employed as solvent mediators. Selectivity coefficients, kpot Li, M, for the Ba(PPG 1025)0.69. (TPB)2-DOPP-based lithium electrode in 0.14 M sodium chloride solution are as follows: Na+ 3.7 × 10–2, K+ 4.4 × 10–3, Ca2+ 4.1 × 10–1 and Mg2+ 8.0 × 10–2. The selectivity coefficients are compared with those for two other previously reported lithium electrodes. The barium polyalkoxylate adduct is a better sensor for lithium than its lithium analogue.