Two-parameter debye-hückel approximation for the evaluation of mean activity coefficients of 109 electrolytes

Meier, P C

doi:10.1016/s0003-2670(01)95397-8

Cited by 359 publications

(204 citation statements)

References 6 publications

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“…Activity coefficients were calculated according to a two-parameter Debye−Huckel approximation. 22 All EMF values were corrected for liquid-junction potentials with the Henderson equation. 23 ■ RESULTS AND DISCUSSION Design of EPADs for Sensing Chloride Ions (Cl − ).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Paper-Based Potentiometric Ion Sensing

et al. 2014

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This paper describes the design and fabrication of ion-sensing electrochemical paper-based analytical devices (EPADs) in which a miniaturized paper reference electrode is integrated with a small ion-selective paper electrode (ISPE) for potentiometric measurements. Ion-sensing EPADs use printed wax barriers to define electrochemical sample and reference zones. Single-layer EPADs for sensing of chloride ions include wax-defined sample and reference zones that each incorporate a Ag/AgCl electrode. In EPADs developed for other electrolytes (potassium, sodium, and calcium ions), a PVCbased ion-selective membrane is added to separate the sample zone from a paper indicator electrode. After the addition of a small volume (less than 10 μL) of sample and reference solutions to different zones, ion-sensing EPADs exhibit a linear response, over 3 orders of magnitude, in ranges of electrolyte concentrations that are relevant to a variety of applications, with a slope close to the theoretical value (59.2/z mV). Ion-selective EPADs provide a portable, inexpensive, and disposable way of measuring concentrations of electrolyte ions in aqueous solutions.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Paper-Based Potentiometric Ion Sensing

et al. 2014

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“…The selectivity coefficients were determined by the separate solution method, the calibration plots of the discriminated ions being measured first [5,6]. Activity coefficients were calculated according to the Debye-H¸ckel approximation [32]. All EMF values were corrected for the liquid-junction potential using the Henderson equation.…”

Section: Emf Measurementsmentioning

confidence: 99%

Influence of Incorporated Lipophilic Particles on Ion Fluxes Through Polymeric Ion‐Selective Membranes

2003

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The incorporation of lipophilic particles into the sensing membrane of ion-selective electrodes (ISEs) can strongly influence the uptake of ions from the sample. The apparent super-Nernstian response of ISEs caused by a strong flux of primary ions from the sample to the inner solution can be suppressed completely. This opens up new possibilities of improving the ruggedness of trace-level measurements.

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“…All the EMF responses were correlated to anion activities that were calculated based on the two-parameter Debye-Hückel method. 19 For most experiments, a 0.05 M glycine-phosphate buffer (pH 3.0) was used as the background electrolyte. Anion solutions were prepared by dissolving corresponding sodium salts in the same buffer.…”

Section: Methodsmentioning

confidence: 99%

Development of a Fluoride-Selective Electrode based on Scandium(III) Octaethylporphyrin in a Plasticized Polymeric Membrane

Kang¹,

Lutz²,

Hong³

et al. 2010

Bulletin of the Korean Chemical Society

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A scandium(III) porphyrin-based fluoride-selective potentiometric sensor and its application in the analysis of hydrofluoric acid is described. Scandium(III) octaethylporphyrin, an ionophore recently developed for the optical fluoride sensor, was employed as a host molecule for the selective binding with fluoride in the plasticized PVC membrane. Nernstian response for F -between 10 -4.6 to 10 -1 M was observed at a glycine-phosphate buffer (pH 3.0). The selectivity pattern was observed as F-, which is consistent with the binding constant data measured in the plasticized PVC membrane based on a sandwich membrane method. This highly selective and reversible fluoride-sensitive electrode was employed for the analysis of hydrofluoric acid (HF). A disposable differential-type HF sensor was fabricated on the screen-printed electrode and demonstrated its ability to detect the neutral HF in the acidic solution.

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Two-parameter debye-hückel approximation for the evaluation of mean activity coefficients of 109 electrolytes

Cited by 359 publications

References 6 publications

Paper-Based Potentiometric Ion Sensing

Paper-Based Potentiometric Ion Sensing

Influence of Incorporated Lipophilic Particles on Ion Fluxes Through Polymeric Ion‐Selective Membranes

Development of a Fluoride-Selective Electrode based on Scandium(III) Octaethylporphyrin in a Plasticized Polymeric Membrane

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