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Formation of Minimal Third Phase in Ionic Liquid Extraction System With Trioctylphosphine Oxide and Its Possible Application to Extraction Concentration

Formation of Minimal Third Phase in Ionic Liquid Extraction System With Trioctylphosphine Oxide and Its Possible Application to Extraction Concentration

Mizuki Toita, Kotaro Morita, Naoki Hirayama

Anal Sci. 2018 Sep 10;34(9):1063-1065.

PMID: 30122734

Abstract:

The third-phase formation behavior in ionic liquid (IL) extraction system using trioctylphosphine oxide (TOPO) was investigated. In the use of a relatively less-lipophilic IL, such as 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (C4mimTf2N), the third phase was formed between the aqueous phase and the IL phase. The third phase seems to have a relatively high lipophilicity compared to the IL phase. The main components of the third phase were suggested as being (H3O)TOPO+, IL anion (Tf2N-), IL cation (C4mim+) and free TOPO. In addition, the third phase showed an extraction concentration ability for the Fe(III)-thiocyanato complex.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP78502	Trioctylphosphine oxide		78-50-2	Price

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