Determination of traces of molybdenum in sea water by combined anion-exchange — graphite furnace atomic absorption spectrometry |
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| Authors: | R Kuroda N Matsumoto and K Oguma |
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| Institution: | (1) Laboratory for Analytical Chemistry, Faculty of Engineering, University of Chiba, Yayoi-cho, Chiba, Japan |
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| Abstract: | Summary Traces of molybdenum in sea water have been preconcentrated by anion-exchange from acidified samples in the presence of sodium azide. Molybdenum adsorbs strongly on a column of Bio-Rad AG 1 (Cl–) and can be stripped easily by elution with 2 mol/l NH4Cl — 2 mol/l NH4OH solution. Molybdenum in the effluent is determined by graphite furnace atomic absorption spectrometry. The combined method allows to determine traces of molybdenum in sea water as well as non-saline water on a 100 ml sample basis. The method gives a relative standard deviation of better than 8% at a molybdenum level of 10  g 1–1 of sea water.
Bestimmung von Molybdänspuren in Meereswasser mit Hilfe einer Kombination von Anionenaustausch und elektrothermischer Atomabsorptionsspektrometrie |
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