A Teflon-Graphite Ion-Selective Probe with Integrated Electronics

Abstract
A Teflon-graphite ion-selective probe and an Ag/AgCl reference probe, each with integrated electronics, are reported. Measurements were successfully performed using a conventional inexpensive digital multi-meter. Calibration plots were obtained for copper, cadmium and lead respectively. For copper (activation with Cu2 S) a comparison was performed of the Teflon-graphite probe prior to the introduction of the electronics and the Radiometer Ruzicka Selectrode®.