Copper(II)-selective electrode based on dithioacetal

✍ Scribed by A Abbaspour; M.A Kamyabi

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 119 KB
• Volume: 455
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(01)01622-1

✦ Synopsis

A PVC membrane electrode for copper ion based on 1,3-dithiane,2-(4-methoxy phenyl) as ionophore and o-nitrophenyl octyl ether as a plasticizer is demonstrated. The electrode exhibits a Nernstian slope of 29.5±1 mV per decade in a linear range of 3.0 × 10 -6 to 5.0 × 10 -2 M for Cu 2+ ion. The detection limit of this electrode is 1.0 × 10 -6 mol/l. This sensor has a very short response time of about 5 s and could be used in a pH range of 4.0-7.0. High selectivity was obtained over a wide variety of metal ions. The proposed electrode was successfully applied as an indicator electrode for the potentiometric titration of copper ion with EDTA and for the direct determination of copper in river water.