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Silicone rubber membrane electrodes

J. Pick, K. Toth, E. Pungor, M. Vasak, and W. Simon, A potassium-selective silicone-rubber membrane electrode based on neutral carrier, Anal Chim Acta 64, 477-480 (1973). [Pg.221]

However, there seems to be some drawback in the solubility or dispersibility of ion-sensing material in silicone rubber. This is mainly because silicone rubber does not contain a large quantity of plasticizer as the membrane solvent, in which neutral carriers can be dissolved easily, unlike in plasticized-PVC ion-sensing membranes. This issue is serious, especially with silicone-rubber membranes containing neutral carriers that show high crystallinity. Valinomycin, a typical ionophore, seems applicable to silicone-rubber-based K" -selec-tive electrodes [7,8,12-14]. Conventional crown-ether-based neutral carriers are also quite soluble in silicone rubber. [Pg.588]

FIG. 5 Potential response of silicone-rubber-membrane Na -selective electrodes based on neutral carriers (5) (O), (2) ( ), and bis(12-crown-4) (A)- (From Ref. 22.)... [Pg.592]

FIG. 11 Potential response of Na+-selective electrodes based on silicone-rubber membranes modified chemically by triethoxysilylated calix[4]arene (8) (O) without anion excluder ( ) with TFPB ( ) modified chemically by triethoxysilylated tetraphenylborate (9) as well. (From Ref. 44.)... [Pg.599]

The Na -selective electrodes based on silicone-rubber membranes modified chemically by (8) and (9), were also investigated for Na assay in control serum and urine [22]. The found values for the Na concentrations in both of the serum and urine samples are in good agreement with their corresponding actual values with a relative standard deviation of about 1%. These results suggest that the Na -selective electrodes based on silicone-rubber membranes modified chemically by calix[4]arene neutral carrier (8) are reliable on assay in human body fluid. [Pg.606]

Polymer membranes have also been used as a "sandwich". In this configuration, the liquid film is supported between two polymer membranes. Ward (18) used two silicone rubber membranes to contain a solution of ferrous ions in formamide. Ward noted that Bernard convection cells could be maintained if the complex were formed at the upper surface. Ward (19) used this same system and membrane configuration to study electrically-induced, facilitated gas transport. The silicone rubber membranes provided the mechanical support so the electrodes could be placed next to each liquid surface. Otto and Quinn (20) immobilized the liquid film in a horizontal layer between two polymer films. The polymer was described as an experimental silicone copolymer having high CO2 permeability as well as excellent mechanical properties. They were studying CO2 facilitated transport in bicarbonate solutions with and without carbonic anhydrase. [Pg.121]

Gas sensors CO2 Combination glass pH electrode, 0.01-0.1 M NaHCOa-NaCl filling solution behind silicone rubber membrane 10-4-10-1 M Interferents are organic acids with similar solubilities to CO2 in gas-permeable membrane... [Pg.12]

Tsujimura, Y., T. Sunagawa, A. Yokoyama, and K. Kimura. 1996. Sodium ion-selective electrodes based on silicone-rubber membranes covalently incorporating neutral carriers. Awa/yj f 121 1705-1709. [Pg.832]

Liquid membranes in this type of ion-selective electrodes are usually heterogeneous systems consisting of a plastic film (polyvinyl chloride, silicon rubber, etc.), whose matrix contains an ion-exchanger solution as a plasticizer (see Fig. 6.5). [Pg.436]

The membranes of the other ion-selective electrodes can be either homogeneous (a single crystal, a pressed polycrystalline pellet) or heterogeneous, where the crystalline substance is incorporated in the matrix of a suitable polymer (e.g. silicon rubber or Teflon). The equation controlling the potential is analogous to Eq. (6.3.9). [Pg.442]


See other pages where Silicone rubber membrane electrodes is mentioned: [Pg.592]    [Pg.202]    [Pg.591]    [Pg.592]    [Pg.202]    [Pg.591]    [Pg.587]    [Pg.588]    [Pg.599]    [Pg.600]    [Pg.433]    [Pg.102]    [Pg.237]    [Pg.17]    [Pg.586]    [Pg.587]    [Pg.598]    [Pg.599]    [Pg.103]    [Pg.63]    [Pg.120]    [Pg.193]    [Pg.158]    [Pg.21]    [Pg.225]    [Pg.559]    [Pg.563]    [Pg.159]    [Pg.190]    [Pg.336]    [Pg.6]    [Pg.669]    [Pg.81]    [Pg.649]    [Pg.65]   
See also in sourсe #XX -- [ Pg.74 ]




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Membrane electrodes

Membrane silicone-rubber

Rubber membranes

Rubber siliconization

Silicon electrode

Silicon rubber, membrane

Silicon rubbers

Silicone membrane

Silicone rubbers

Silicones silicone rubbers

Siliconized rubber

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