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Investigations of the possibilities of determining vanadium in water by absorption atomic spectrometry using initial concentration by the chelate formation and extraction methods

Karp G., Wiśniewski S., Aftanas B., Bolałek J.

Biuletyn Instytutu Morskiego w Gdańsku

1998

Vol. 25, No. 1

69--76

Possibilities of determining low concentrations of vanadium in underground and surface waters using the absorptive atomic spectrometry with flame excitation method were tested. Due to the very low le vel of concentration of the determined element in water, initial condensation was necessary by chelate formation with 1-ammonium-pyrrolidin-dithiocarbamat (APDC) at pH= 4, and by extracting to the isobutyl methyl ketone (MIBK). Spectrometric measurements were made in the obtained extract. After optimising the conditions of measurement, investigating and determining the influence of disturbing substances, and determining the limit of detectability, it was found that using the developed method vanadium can be determined in water in the range of concentrations between 0.004 and 0.050 mgV/dm3. Determination becomes impossible if concentrations of iron of over 0.5 mgldm3 are present.