Copper(II)-selective electrode using 2,2 '-dithiodianiline as neutral carrier

Poly(vinyl chloride) membrane electrode, that is highly selective and sensi tive to Cu(II) ions, was developed by using 2,2'-dithiodianiline and dibuty l phthalate as carrier and plasticizer, respectively. The electrode exhibit s good potentiometric response for Cu(II) over a wide concentration range ( 5.0 x 10(-2)-7.0 x 10(-7) mol l(-1))with Nernstian slope of 30 +/- 1 mV per decade. The response time of the electrode is 10 s and it has been used fo r a period of one month and exhibits good selectivity towards Cu2+ in compa rison to alkali, alkaline earth, transition and heavy metal ions, with no i nterference caused by Pb2+, Cd2+ and Fe+2 which are known to interfere with many other copper electrodes. (C) 2001 Elsevier Science B.V. All rights re served.