Summary
Traces of Ga in sea and fresh water have been enriched by anion-exchange from an acidified sample in the presence of thiocyanate. Gallium adsorbs strongly on a column of Amberlite CG 400 and can be stripped with a NaOH-NaCl solution. Gallium in the effluent is purified by anion-exchange from HCl and determined spectrophotometrically with Rhodamine B as colour reagent. The combined method allows to determine traces of Ga in sea water as well as fresh water on a 101 sample basis. The standard deviation is about 17% at a Ga level of 0.01 Μg/l.
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Kiriyama, T., Kuroda, R. Anion-exchange enrichment and spectrophotometric determination of traces of gallium in natural waters. Z. Anal. Chem. 332, 338–340 (1988). https://doi.org/10.1007/BF00468811
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DOI: https://doi.org/10.1007/BF00468811