The diluent characteristics and the wide electrochemical window of the ionic liquid (IL), n-hexyl-trimethyl ammonium bis(trifluoromethyl-sulfonyl)amide; [N₁₁₁₆][TFSA], have been exploited for the extraction of In(III) from 1,1,1-trifluoro-N-[(trifluoromethyl)sulfonyl]methane sulfonamide (H[TFSA]) aqueous solution using 1.0 M tri-n-butylphosphate (TBP) in [N₁₁₁₆][TFSA], followed by direct electrodeposition as In metal from organic phase. The extraction mechanism of In(III) with TBP/[N₁₁₁₆][TFSA] has been investigated from the slope analysis. As a result, it was revealed that the extraction mechanism of In(III) in IL system was based on the following solvation extraction by TBP and the [N₁₁₁₆⁺] cation exchange extraction; [In(III)]_aq + 3[TBP]_IL + [N₁₁₁₆][TFSA]_IL + 2[TFSA⁻]_aq ↔ [In(TBP)₃³⁺(TFSA⁻)₃]_IL + [N₁₁₁₆⁺]_aq. Moreover, the selective extraction of In(III) from the aqueous phase including Ni(II) and Zn(II) was performed in the range of pH = 1.5–4.0.

The electrochemical behavior of extracted [In(TBP)₃³⁺] complex in [N₁₁₁₆][TFSA] on a platinum quartz crystal electrode was investigate by EQCM analysis. The reduction peak at −1.0 V was assigned at the [In(TBP)₃³⁺]/In(0) couple on the voltammogram. Potentiostatic electrodeposition of [In(TBP)₃³⁺] at −1.0 V allowed us to obtain the blackish electrodeposits, which were identified as most of In metal by EDX and XRD analyses.

离子液体（IL），正己基三甲基铵双（三氟甲基磺酰基）酰胺的稀释特性和宽的电化学窗口；[N ₁₁₁₆ ] [TFSA]已被用于从1.0,3,3,1,1,1-三氟-N -[（三氟甲基）磺酰基]甲烷磺酰胺（H [TFSA]）水溶液中萃取In（III）-在[N ₁₁₁₆ ] [TFSA]中加入磷酸正丁酯（TBP），然后直接从有机相中电沉积为In金属。TBP / [N _1116]萃取In（III）的机理] [TFSA]已通过斜率分析进行了研究。结果表明，IL系统中In（III）的萃取机理是基于TBP的以下溶剂化萃取和[N ₁₁₁₆ ⁺ ]阳离子交换萃取。[在（III）]_水溶液 + 3 [TBP] _IL  + [N ₁₁₁₆ ] [TFSA] _IL  + 2 [TFSA ^- ]_水溶液 ↔[在（TBP）₃ ³⁺（TFSA ^-）₃ ] _IL  + [N ₁₁₁₆ ⁺ ] _aq。此外，在pH = 1.5–4.0的范围内，从包括Ni（II）和Zn（II）的水相中选择性萃取In（III）。

通过EQCM分析研究了在[N ₁₁₁₆ ] [TFSA]中萃取的[In（TBP）₃ ³⁺ ]络合物在铂石英晶体电极上的电化学行为。伏安图上的[In（TBP）₃ ³⁺ ] / In（0）对指定了-1.0 V处的还原峰。[In（TBP）₃ ³⁺ ]的恒电位电沉积在-1.0 V下使我们可以获得黑色的电沉积物，该沉积物通过EDX和XRD分析鉴定为大多数In金属。