Results 201 to 210 of about 59,300 (253)

PVC matrix membrane sensor for fluorescent determination of phosphate

Talanta, 2006
A novel polyvinyl chloride (PVC) matrix membrane sensor responsive to inorganic phosphate ion was described. The working pH range is 4.0-6.0 and the response time is about 7.5min. Under the optimum condition, the sensor displayed a good linear response for H(2)PO(4)(-) anion over the concentration range 6.00-15.00mug/ml with a limit detection of 0 ...
Xucong Lin, Zenghong Xie, Kwok-Yin Wong   +2 more
exaly   +3 more sources

Electrical noise from PVC-membranes

Pfl�gers Archiv European Journal of Physiology, 1973
Voltage fluctuations were measured across a polyvinylchloride (PVC)-membrane, acting as a constraint between two identical aqueous salt solutions. Membranes with de-resistances between about 2 and 10 megohms. cm2 were studied in solutions of KCl between 0.01 and 0.10 moles per liter. Positive and negative currents between 10 and 100 nanoamps per square
J P, Michalides, R A, Wallaart, L J, DeFelice   +2 more
openaire   +2 more sources

Ionic mobilities in PVC membranes

Electrochimica Acta, 1987
Ionic mobilities have been measured for K+, N+, BPh−4 in plasticized PVC membranes, on the assumption that the mobility of AsPh+4 is identical with that of BPh−4. The measurements show that in a typical membrane used as an ISE and containing 10−2 M valinomycin + 10−3 M KBPh−4, the transport number of K+ val is 0.87 whilst that of BPh−4 is 0.13.
R.D. Armstrong, M. Todd
openaire   +1 more source

Solvent properties of PVC membranes

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1988
Abstract The solvent properties of PVC/dioctyl sebacate membranes have been explored by (i) measuring the dielectric constant of membranes as a function of composition and (ii) measuring the conductivity of membranes containing 1 mM NaBPh4 as a function of composition.
R.D. Armstrong, A.K. Covington, W.G. Proud   +2 more
openaire   +1 more source

Theory of electric characteristics of the lipid/PVC/DOPP membrane and PVC/DOPP membrane in response to taste stimuli

Biophysical Chemistry, 1996
Electric characteristics of two kinds of membranes in response to NaCl and quinine were theoretically studied; one membrane composed of polyvinyl chloride (PVC) and dioctylphenylphosphonate (DOPP), and the other a lipid/PVC/DOPP membrane containing PVC, DOPP and a negatively charged lipid.
K, Oohira, K, Toko
openaire   +2 more sources

Dams with PVC membranes

2023
Abstract PVC geomembranes have been used since 1960 to provide or enhance watertightness in new dams and for remedial works on existing dams. Their deformability and tensile resistance can be an added value in the construction of dams in seismic areas because they can withstand, without failing, the high stresses resulting from a ...
openaire   +1 more source

Deoxycholate‐sensitive PVC membrane electrode

Electroanalysis, 1991
AbstractA deoxycholate‐sensitive membrane electrode has been developed using cetyltrimethylammonium deoxycholate as the sensor material. The electrode can be used for the potentiometric determination of sodium deoxycholate.
János Gyimesi, Barna Kovács
openaire   +1 more source

Benzylpenicillin PVC membrane electrode for the determination of antibiotics in formulations

Journal of Pharmaceutical and Biomedical Analysis, 1988
A PVC (polyvinychloride) ion selective electrode, employing benzyldimethyl-cetylammoniumbenzylpenicillin as sensor, was prepared, characterized and applied to the analysis of commercially available formulations containing benzylpenicillin and other antibiotics of the penicillin or cephalosporin group.
CAMPANELLA, Luigi, MAZZEI, Franco, SBRILLI R., TOMASSETTI, Mauro   +3 more
openaire   +3 more sources