Abstract
鉄その他の共存成分からフィチンによってニオブを沈殿させ分離したのち,スルホクロロフェノールSで呈色させる方法を検討し,あらゆる種類の鋼中の0.01～4%の広範囲のニオブを定量しうる,新しい吸光光度定量操作法を確立した.本法の特長としては,3価の鉄共存のもとにフィチンによるニオブの分離を行なうこと,妨害成分がほとんどなく,タングステン,モリブデン,チタン,バナジウムなどの共存もなんら障害とならないこと,などがあげられる.
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