Spectrophotometric determination of copper(II) at low mu g 1(-1) levels using cation-exchange microcolumn in flow-injection


Isildak İ. , Asan A., Andac M.

TALANTA, vol.48, no.1, pp.219-224, 1999 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 1
  • Publication Date: 1999
  • Doi Number: 10.1016/s0039-9140(98)00241-0
  • Title of Journal : TALANTA
  • Page Numbers: pp.219-224

Abstract

A simple spectrophotometric flow-injection method is reported for the highly sensitive and fast determination of copper(II). The method is based on the formation of coloured Cu(II)-(4-methylpiperidinedithiocarbamate)(2) complex when the copper solutions are introduced into a tertiary reagent stream containing 4-methylpiperidinedithiocarbamate. The coloured complex is then selectively monitored at 435 nm. To increase interactions between copper(II) and colour forming reagent and preconcentrate of copper(II), a microcolumn containing strong cation exchange resins was placed between injection manifold and spectrophotometer. The system required no mixing chamber and allowed a sample throughput > 60 sample h(-1). The calibration graph was linear in the range 5-100 mu g 1(-1). The detection limit was < 0.5 mu g 1(-1) for 20 mu 1 injection volume of copper(II) ion solution. The developed method was applied to environmental, copper processing water, and ore samples. (C) 1999 Elsevier Science B.V. All rights reserved.