高分子量アミン-ベンゼン溶液抽出法による高合金鋼中のタンタルの定量

概要

論文の詳細を見る
A spectrophotometric method for the determination of tantalum, based on ion exchange extractions of the associated ions in high alloy steels using high molecular weight amine-benzene solution (Amberlite LA-2), is described. The behaviors of the tested ions are investigated for the various extractants, hydrofluoric acid-hydrochloric acid solutions (Table I, Fig. 2, and Fig. 3). The main procedure of the recommendation for the determination is as follows: Dissolve 1g of high alloy steel with aqua regia and hydrofluoric acid and dilute the solution to 100ml. Shake an aliquot of the solution with 50ml of 1F HF-0.1F HCl and 25ml of Amberlite LA-2-benzene solution. The organic layer is shaken with 50ml of 0.5F HF-3F HCl and 50ml of 0.5F HF-0.5F HCl, successively, to eliminate interfering ions. Back-extract tantalum in the aqueous phase with 1F NH4F-4F NH4Cl. Add 0.5ml of 1.5F NH4OH, 10ml of (NH4)2SO4 (0.45g/ml) and 3ml of H2SO4 (1:1), 7.5ml of Malachite Green solution (0.2%). Extract the complex with 25ml of benzene after standing for 5min. After 7min, the absorbancy at 630mμ is measured. A synthesized and three steel samples were analyzed.
社団法人日本分析化学会の論文