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A moderately hydrophobic ionic liquid, tributyl(2-methoxyethyl)phosphonium bis(pentafluoroethanesulfonyl)amide ([TBMOEP + ][C 2 C 2 N − ]), shows a very stable liquid junction potential upon contact with an aqueous solution whose ionic strength is as low as 1μmoldm −3 . The stability with the maximum excursion of the potential within ±0.5mV for 30min is very...
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