Colorimetric Determinations of Niobium and Tantalum
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概要
- 論文の詳細を見る
Niobium develops a stable yellow color and tantalum does not with pyrogallol at pH 4.6-6.8 in the solution containing sodium sulfite, which is applicable for the photometrical determination of niobium. As little as 0.4γ per ml can be determined. Tantalum develops a stable yellow color and niobium does not with pyrogallol in the acidic solution containing sulfuric acid in less than 3N and a minute amount of sodium sulfite. Applying the coloration, as little as 0.05 mg per ml can be determined photometrically. Acetic acid, citric acid, succinic acid, phthalic acid, nitric acid, hydrochloric acid and perchloric acid do not interfere the both determinations.
- 東北大学の論文
著者
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Goto Hidehiro
The Research Institute For Iron Steel And Other Metal S
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Kakita Yachiyo
The Research Institute For Iron Steel And Other Metals
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Goto Hidehiro
The Research Institute For Iron Steel And Other Metal
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