Extraction processes of indium(III) with 2-octylaminopyridine (2-OAP) from media of various complexing ability, succinate and salicylate, in chloroform have been elucidated. The ion-pair complex has also quantitative extraction in xylene and 1,2-dichloroethane. Indium(III) from organic phase was stripped with 1.0 M hydrochloric acid and determined complexometrically with EDTA. The stoichiometry of the extracted species was found out on the basis of slope analysis. The extraction of indium(III) proceeds by an anion exchange mechanism and the extracted species is [RR′NH₂ ⁺In(succinate)₂ ^-]_(org). Temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions (ΔH, ΔG and ΔS) for extraction reaction. It is possible to separate indium(III) from Zn(II), Cd(II), Pb(II), Hg(II), Bi(III), Tl(I), Tl(III), Ga(III), Al(III), Te(IV), Se(IV), Sb(III), Fe(III) and Sn(IV). The method is simple, rapid and reproducible and can be used to determine the indium from samples like alloys.

中文翻译：

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2-辛基氨基吡啶在氯仿中从琥珀酸酯溶液中溶剂萃取三价铟

阐明了用2-辛基氨基吡啶（2-OAP）从氯仿中具有多种络合能力的琥珀酸盐和水杨酸盐介质中萃取铟（III）的方法。离子对络合物还可以在二甲苯和1,2-二氯乙烷中进行定量萃取。用1.0 M盐酸汽提有机相中的铟（III），并用EDTA进行络合测定。在斜率分析的基础上发现了提取物的化学计量。铟（III）的提取通过阴离子交换机理进行，提取的种类为[RR'NH ₂ ⁺ In（琥珀酸）₂ ^- ] _（org）。还检查了萃取平衡常数的温度依赖性，以估算表观热力学函数（ΔH，ΔG和ΔS）用于萃取反应。可以将铟（III）与Zn（II），Cd（II），Pb（II），Hg（II），Bi（III），Tl（I），Tl（III），Ga（III）， Al（III），Te（IV），Se（IV），Sb（III），Fe（III）和Sn（IV）。该方法简单，快速且可重现，可用于从合金等样品中测定铟。