Abstract Potentiometric selectivity coefficients have been collected for ionophore-based ion-selective electrodes (ISEs) inorganic cations reported from 1988-1997. In addition to numerical values of K (A,B) pot together with the methods and conditions their determination, response slopes, linear concentration ranges, chemical compositions, ionophores structures ISE membranes are tabulated.

The colloidal stability of silver nanoparticles (AgNPs) in natural aquatic environments influences their transport and environmental persistence, while dissolution to Ag+ toxicity organisms. Here, we characterize the stability, behavior, two industrially relevant classes AgNPs (i.e., stabilized by citrate or polyvinylpyrrolidone) after exposure organic matter (NOM, i.e., Suwannee River Humic Fulvic Acid Standards Pony Lake Reference). We show that NOM interaction with nanoparticle surface...

Key parameters that influence the specific energy of electrochemical double-layer capacitors (EDLCs) are capacitance and operating potential cell. The cell is generally limited by window electrolyte solution, is, range applied voltages within which or solvent not reduced oxidized. Ionic liquids interest as electrolytes for EDLCs because they offer relatively wide windows. Here, we provide a systematic study physical properties ionic liquid on stability performance (double-layer capacitance,...

A new type of solid-contact ion-selective electrode (SC-ISE) has been developed that uses colloid-imprinted mesoporous (CIM) carbon with 24 nm diameter, interconnected mesopores as the intermediate layer between a gold and an ionophore-doped ISE membrane. For demonstration, valinomycin was used K(+) ionophore, good Nernstian response slope 59.5 mV/decade in range from 10(-5.2) to 10(-1.0) M observed. The high purity, low content redox-active surface functional groups intrinsic hydrophobic...

This article reviews recent advances in the field of potentiometric solvent polymeric membrane electrodes. These sensors have found widespread applications a variety fields, especially area clinical diagnostics. Emphasis is given on discussion theoretical and practical limits ionophore-based ion-selective electrodes, with special focus electrode sensitivities, characterization selectivities dramatic improvements detection limits. Advances ionophore design underlying model assumptions are...

We report a new way of developing ion gels through the self-assembly triblock copolymer in room-temperature ionic liquid. Transparent were achieved by gelation poly(styrene-block-ethylene oxide-block-styrene) (SOS) 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) with as low 5 wt % SOS copolymer. The behavior, conductivity, rheological properties, and microstructure investigated. conductivity is only modestly affected network. Its temperature dependence nearly tracks that bulk...

Electrodes with three-dimensionally ordered macroporous (3DOM) carbon as the intermediate layer between an ionophore-doped solvent polymeric membrane and a metal contact are presented novel approach to solid-contact ion-selective electrodes (SC-ISEs). Due well-interconnected pore wall structure of 3DOM carbon, filling pores electrolyte solution results in nanostructured material that exhibits high ionic electric conductivity. The long-term drift freshly prepared SC-ISEs contacts is only 11.7...

This paper describes the design and fabrication of ion-sensing electrochemical paper-based analytical devices (EPADs) in which a miniaturized reference electrode is integrated with small ion-selective (ISPE) for potentiometric measurements. Ion-sensing EPADs use printed wax barriers to define sample zones. Single-layer sensing chloride ions include wax-defined zones that each incorporate Ag/AgCl electrode. In developed other electrolytes (potassium, sodium, calcium ions), PVC-based membrane...

The ability to tune polymer monolith porosity on multiple length scales is desirable for applications in liquid separations, catalysis, and bioengineering. To this end, we have developed a facile synthetic route nanoporous monoliths based controlled polymerization of styrene divinylbenzene from poly(lactide) macro-chain transfer agent the presence nonreactive poly(ethylene oxide) (PEO). Simple variations volume fraction and/or molar mass PEO lead either polymerization-induced microphase...

Compared to rechargeable batteries, electrochemical double-layer capacitors (EDLCs) are normally considered be higher power but lower electrical energy density charge storage devices. To increase the density, one can enlarge interfacial area between electrodes and electrolyte through introduction of nanopores employ electrolytes that stable over wider voltage ranges, such as ionic liquids. However, due relatively high viscosity liquids large ion sizes, these measures result in diminished...

Abstract Ion‐selective electrodes (ISEs) are widely used tools for fast and accurate ion sensing. Herein their design is simplified by embedding a potentiometric cell into paper, complete with an ISE, reference electrode, paper‐based microfluidic sample zone that offer the full function of conventional ISE setup. The disposable planar ion‐sensing platform suitable low‐cost point‐of‐care in‐field testing applications. symmetrical each interfacial potential within well defined reproducible, so...

Reference electrodes are used in almost every electroanalytical measurement. Here, all-solid-state reference described that employ colloid-imprinted mesoporous (CIM) carbon as solid contact and a poly(vinyl chloride) membrane to the sample. Such is doped with moderately hydrophilic ionic liquid hydrophobic redox couple, leading well-defined constant potentials at interfaces of this sample contact, respectively. Due intrinsic properties CIM carbon, exhibit excellent resistance common...