2,4,6-トリス(2-ピリジル)-s-トリアジン吸光光度法による非鉄地金および合金中の微量鉄定量法

概要

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A preliminary separation procedure of a small amount of iron, ranging from 0.001 to 0.5%, in nickel, copper, cobalt, titanium and aluminum metals and alloys, prior to the colorimetric determination with 2, 4, 6-tris (2-pyridyl)-s-triazine method, has been investigated. In nickel, copper, cobalt, titanium metals, iron was separated from on 7 N hydrochloric acid solution by the extraction with methyl-isobutyl ketone. As for aluminum and its alloys, after being decomposed with sodium hydroxide, iron was precipitated and separated as a form of hydroxide, together with the calcium added as a coprecipitant. In coloration ascorbic acid was used for the reduction of Fe3+ to Fe2+, and it was found that the time required for the reduction was much faster.
社団法人日本分析化学会の論文