COPPERII-SELECTIVE ELECTRODES BASED ON 1-FUROYL-3,3-DIETHYLTHIOUREA AS A NEUTRAL CARRIER

Abstract

abStraCt 1-furoyl-3,3-diethylthiourea was used as a novel neutral carrier in ion selective electrode for copper II detection and determination. The Cu 2+ selective plasticized polyvinyl chloride (PVC) membrane electrode exhibited reversible potential responses with Nernstian slope of 29.34± 0.6 2+ mV/decade for Cu ions in the concentration range from 1.0×10 −7 to 1.0×10 −2 mol/dm 3 with a practical detection limit (PDL) of 3.84x10 -7 and lower limit of linear response (LLLR) of 6.15x10 -7 mol/dm 3 and a life-time of 20 days. The response time, pH effect and other characteristics of the electrodes were also studied. Keywords: II Neutral carrier; Copper -selective potentiometric sensor; Ion-selective electrode (ISE). IntroduCtIon Copper can be found in many kinds of food, in drinking water and in air. The absorption of copper is necessary, because copper is a trace element that is essential for human health. Although humans can handle proportionally large concentrations of copper, too much copper can still cause eminent health problems. However, copper deficiency causes anemia