Determination of cobalt at low levels in silicate rocks by atomic absorption spectrometry using a continuous on-line precipitation-dissolution procedure based on 1-nitroso-2-naphthol
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 4 (6) , 547-550
- https://doi.org/10.1039/ja9890400547
Abstract
A continuous pre-concentration flame atomisation atomic absorption spectrometric method for the determination of cobalt by precipitation with 1-nitroso-2-naphthol is proposed. The sample treatment, dissolution of the tris(1-nitroso-2-naphthalato)cobalt(III), optimisation of analytical variables and measurable concentration levels are discussed. Several calibration graphs were used for the determination of CoII in the range 1–180 ng ml–1 with a sampling frequency of between 4 and 40 h–1 and a relative standard deviation of between 2.5 and 3.0%. The proposed method was successfully applied to the determination of Co at the µg g–1 level in silicate rocks.Keywords
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