All-solid-state chloride-selective electrode based on poly(3-octylthiophene) and tridodecylmethylammonium chloride

All-solid-stare chloride-selective electrodes with plasticizer-free membran es were prepared by incorporation of tridodecylmethylammonium chloride (TDM ACl) in a semiconducting conjugated polymer matrix of poly(3-octylthiophene ) (POT). The membrane components were dissolved in chloroform and deposited on glassy carbon by solution casting resulting in all-solid-state chloride sensors. The analytical performance of the chloride sensors were studied b y potentiometric measurements. The selectivity sequence was close to the Ho fmeister series and the interference from lipophilic anions like ClO4-, SCN -, NO3- and Br- was significantly reduced in comparison with chloride elect rodes based on TDMACl and plasticized PVC.