く形波ポーラログラフ法による鉄鋼中のインジウム定量

概要

論文の詳細を見る
Square-wave polarographic method for the determination of indium in iron and steel was studied as follows. Two tenths gram of sample is dissolved in hydrochloric acid and nitric acid, and the solution is evaporated to dryness. The salts are dissolved in 2 ml of hydrochloric acid (1 : 1), diluted with 10 ml of water, and, after an addition of 10 ml of hydroxylamine hydrochloride solution (10%), heated to boiling for 2 minutes. After cooling, the solution is mixed with 15 ml of hydrochloric acid and diluted to 50 ml with water. The resulting solution is analyzed for In polarographically. The potential of the peak of In is -0.60 V (vs. Hg pool). The method permits the determination of 0.0050.2% In at an absolute error <0.005%, within 20 minutes. One milligram of As, Pb and 0.1 mg of Sn interfere, but 1 mg each of Al, B, Bi, Ce, Co, Cr, Cu, Ga, Mn, Mo, Nb, Ni, P, Sb, Se, Si, Te, Ti, V, W, Zn, and Zr do not.
社団法人日本分析化学会の論文