On-line preconcentration and determination of nickel in natural water samples by flow injection-inductively coupled plasma optical emission spectrometry (FI-ICP-OES)

N. Yunes, S. Moyano, S. Cerutti, J. A. Gásquez, L. D. Martinez

Research output: Contribution to journalArticlepeer-review

Abstract

An on-line nickel preconcentration and determination system implemented with inductively coupled plasma optical emission spectrometry (ICP-OES) associated to flow injection (FI) was studied. Trace amounts of nickel were preconcentrated by sorption on a conical minicolumn packed with activated carbon (AC) at pH 5.0. The nickel was removed from the minicolumn with 20% nitric acid. An enrichment factor of 80-fold for a sample volume of 50 ml was obtained. The detection limit (DL) value for the preconcentration method proposed was 82 ng 1-1. The precision for ten replicate determinations at the 0.5 μg 1-1 Ni level was 3.0% relative standard deviation (R.S.D.), calculated from the peak heights obtained. The calibration graph preconcentration method for nickel was linear with a correlation coefficient of 0.9997 at levels near the detection limits (DL) up to at least 100 μg 1-1. The method was successfully applied to the determination of nickel in natural water samples.

Original languageEnglish (US)
Pages (from-to)943-949
Number of pages7
JournalTalanta
Volume59
Issue number5
DOIs
StatePublished - Apr 10 2003
Externally publishedYes

Keywords

  • Flow injection
  • ICP-OES
  • Nickel in water samples
  • On-line preconcentration

ASJC Scopus subject areas

  • Analytical Chemistry

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