AI Article Synopsis
- A new ionic liquid salt bridge (ILSB) combines two types of salts to create a stable phase-boundary potential when in contact with various aqueous solutions.
- The stable potential remains consistent over a concentration range from 0.05 mM to 0.5 M, with minimal fluctuations (±0.3 mV) during a one-hour period.
- This innovative mixing approach not only improves stability but also offers flexibility for designing ILSBs tailored for specific applications by choosing different potential-determining salts.
Article Abstract
A new type of ionic liquid salt bridge (ILSB) based on a mixture of pentyltripropylammonium bis(pentafluoroethanesulfonyl)amide, [N(3335)(+)][C(2)C(2)N(-)], and heptadecafluorodecyltrioctylphosphonium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, [TOPH(+)][TFPB(-)], shows a stable phase-boundary potential (Δ(IL)(W)φ) between the ILSB and an aqueous solution of MCl (M = H(+), Li(+), Na(+), and K(+)) over the concentration range from 0.05 mM to 0.5 M with an averaged excursion in 1 h of ±0.3 mV. The reproducibility of Δ(IL)(W)φ is ±0.6 mV on average (95% confidence interval) in KCl solutions in this concentration range. The mixing of the two different types of salts not only increases the stability of the phase-boundary potential but provides us with more freedom in selecting potential-determining salts to design and customize ILSBs for different purposes.
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| http://dx.doi.org/10.1021/ac203425u | DOI Listing |
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