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On-line preconcentration and determination of trace platinum by flow-injection atomic absorption spectrometry

✍ Scribed by A. Cantarero; M.M. Gómez; C. Cámara; M.A. Palacios

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
584 KB
Volume
296
Category
Article
ISSN
0003-2670

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✦ Synopsis

The analytical performance of a platinum preconcentration method using a 0.01 M HNO, carrier solution and an alumina microcolumn is discussed. On-line preconcentration is followed by flame atomic absorption spectrometry (FAAS), and off-line preconcentration by graphite furnace atomic absorption spectrometry (GFAAS). The preconcentration factors were 600 for FAAS (25 ~1 elution volume) and 30 for GFAAS (500 ~1 elution volume), both with a U-ml sampling volume. The detection limits in these conditions were 0.02 mg l-l, and relative standard deviation (R.S.D.) of 9% (0.1 mg 1-l solution, n = 5) for FAAS and 0.33 pg l-l, and a R.S.D. of 7% (5 pg 1-l solution )1= 5) for GFAAS. The proposed method is suitable for platinum determination in natural water samples.

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