Determination of cobalt and nickel in water samples by flame atomic absorption spectrometry after cloud point extraction

Cloud point extraction has been used for the preconcentration of cobalt and nickel, after the formation of a complex with 1-(2-thiazolylazo)-2-naphthol (TAN), and later analysis by flame atomic absorption spectrometry using octylphenoxypolyethoxyethanol (Triton X-114) as surfactant. The chemical var...

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Bibliographic Details
Published in:Analytica chimica acta 2001-05, Vol.434 (2), p.325-330
Main Authors: Chen, Jianrong, Teo, Khay Chuan
Format: Article
Language:English
Subjects:
Analysis methods
Analytical chemistry
Applied sciences
Chemistry
Cloud point extraction
Cobalt
Exact sciences and technology
Flame atomic absorption spectrometry
Natural water pollution
Nickel
Pollution
Spectrometric and optical methods
Water treatment and pollution
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Summary:Cloud point extraction has been used for the preconcentration of cobalt and nickel, after the formation of a complex with 1-(2-thiazolylazo)-2-naphthol (TAN), and later analysis by flame atomic absorption spectrometry using octylphenoxypolyethoxyethanol (Triton X-114) as surfactant. The chemical variables affecting the separation phase and the viscosity affecting the detection process were optimized. Under the optimum conditions, preconcentration of only 50 ml of sample in the presence of 0.05% Triton X-114 permitted the detection of down to 0.24 μg l −1 cobalt and 0.44 μg l −1 nickel. The enhancement factors were 57 for cobalt and 65 for nickel. The proposed method has been applied to the determination of cobalt and nickel in water samples.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(01)00849-2