Determination of Trace Gallium by Electrothermal Atomic Absorption Spectrometry after Preconcentration on a Membrane Filter with a Finely Pulverized Anion-Exchange Resin.
作者： Junichi SHIDA , Shigemitsu UMEKI
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摘要: A sensitive method based on preconcentration a membrane filter with finely pulverized anion-exchange resin has been developed for the determination of gallium in water samples by electrothermal atomic absorption spectrometry. Gallium (10-60)ng, 20-500ml sample solution, was retained as Pyrocatechol Violet complex anion at pH 5; resulting filtered through filter. portion (3mm diameter) inserted into cuvette, and absorbance measured 294.4nm. The relative standard deviations five measurements 30ng 5%. detection limit 1.5ng 500ml (3ngGa l-1) sample. interference various ions studied, optimum conditions were mine-drainage river-water samples.
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