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

IŞILDAK İ., Asan A., Andaç M.

Talanta, vol.48, no.1, pp.219-224, 1999 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 1
  • Publication Date: 1999
  • Doi Number: 10.1016/s0039-9140(98)00241-0
  • Journal Name: Talanta
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.219-224
  • Keywords: 4- Methylpiperidine-dithiocarbamate, Copper(II) determination, Flow-injection photometric method, Microcolumn
  • Ondokuz Mayıs University Affiliated: Yes


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 μg 1-1. The detection limit was < 0.5 μg 1-1 for 20 μl injection volume of copper(II) ion solution. The developed method was applied to environmental, copper processing water, and ore samples.