Graphite furnace atomic absorption spectrometric determination of nickel at sub-ng g–1levels in marine samples by carbonyl generation with in situ pre-concentration
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 4 (5) , 443-446
- https://doi.org/10.1039/ja9890400443
Abstract
Reduction of NiII in solution by addition of BH4 – and its carbonylation in a stream of CO-Ar serves to transfer the volatile Ni(CO)4 from a generation cell to a pre-heated graphite furnace where it undergoes decomposition and deposition at T > 500 °C. Subsequent atomisation at T > 2700 K and measurement of the atomic absorption serves to quantify Ni in test samples by direct comparison with signals derived from identically treated solutions of standards. The system is ca. 80% efficient and is characterised by a concentration detection limit (3σ) of 4 ng l–1, based on a 10-ml test sample. Results are presented for the analyses of several natural water and biological reference materials.Keywords
This publication has 0 references indexed in Scilit: