モリブデンおよびバナジウムの共存する場合について : 硫酸錯塩による鉄の吸光光度分析法

概要

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Fe3+ gives a sulfate complex but Mo6+ and V5+ do not. That the increase in light absorbancy at 300 mμ by the addition of Na2SO4 is attributed to the formation of a complex sulfate of Fe3+ and the increase of the light absorbancy is directly proportional to the concentration of Fe3+, provided that the amount of addition of Na2SO4 is definite. By applying these facts, the determination of 115 p. p. m. of iron is possible when the concentration of coexisting Mo6+ or V5+ is below 50 p. p. m. or 30 p. p. m. respectively. The determination of iron in Fe-Mo and Fe-V alloys was made by application of differential method but the precision was not very high. The light absorbancy by Mo6+ and V5+ at 300 mμ showed a lower value. Accordingly, the estimation of the iron at longer wave length would give better result.
社団法人日本分析化学会の論文