Minimization of the acetate interference of calcium-selective carrier-PVC-membrane electrodes for process-controlled haemodialysis

Heidrich, Jens P.; Herna, K.; Schindler, M. M.; Schindler, J. G.

doi:10.1007/bf00323976

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…587 Contrary to theoretical expectations, acetate interference was reported to increase with the concentration of lipophilic anionic sites in ETH 1001 (Ca 2+ -5) membranes. 588 In addition to reasons discussed above for a similar case of K + solid-contact electrodes by the same authors, 391 doubts on this interpretation arise from the fact that high acetate concentrations strongly affect the responses of nearly all the Ca 2+ sensors tested in that particular investigation.…”

Section: T H Imentioning

confidence: 93%

“…section II.3) and apply also to Ca 2+ measurements. ,,,,,− Furthermore, binding of Ca 2+ to heparin may cause erroneous Ca 2+ determinations. , Special care must also be taken to prevent loss of CO 2 from the sample because the amount of Ca 2+ bound to proteins is very large, , and the concentration of free Ca 2+ depends even more strongly on the pH than in the case of Mg 2+ . , Moreover, a temperature dependence of the free calcium concentration was reported . Contrary to theoretical expectations, acetate interference was reported to increase with the concentration of lipophilic anionic sites in ETH 1001 ( Ca 2+ -5 ) membranes . In addition to reasons discussed above for a similar case of K + solid-contact electrodes by the same authors, doubts on this interpretation arise from the fact that high acetate concentrations strongly affect the responses of nearly all the Ca 2+ sensors tested in that particular investigation.…”

Section: Ca2+ Sensorsmentioning

confidence: 97%

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Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

1998

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and 1991, respectively. He has been working in the field of chemical sensors since 1970. Further topics of his interest are spectroscopic databases, automatic spectra interpretation, and modeling of structure−property relationships. He has published over 180 papers and 7 books. Current activities in the fields of chemical sensors and computer-aided analytical chemistry are documented on the web page http://www/ceac.ethz.ch/pretsch/. His e-mail address is pretsch@ org.chem.ethz.ch.

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Section: T H Imentioning

confidence: 93%

Section: Ca2+ Sensorsmentioning

confidence: 97%

Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

1998

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“…For example, the application in acetate containing dialysis solutions requires a membrane with a minimized interference to anions, in this case especially acetate (7,8). For example, the application in acetate containing dialysis solutions requires a membrane with a minimized interference to anions, in this case especially acetate (7,8).…”

Section: Resultsmentioning

confidence: 99%

Continuous Analysis in Extracorporeally Circulating Blood - A Rat Model Applying Flow-Through Ion-Selective Electrodes for the Measurement of Ca2+, K+, Na+ and pH

Heidrich¹,

Niemeier²,

Seyfarth³

1998

CCLM

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A rat model is introduced which enables investigations in anticoagulated blood with continuous measurements by a flow-through electrode system. In the present study, a potentiometric ion-selective electrode (ISE)-system was used for measuring Ca2+, K+, Na+ and pH in rats. The setup was adjusted to an extracorporeal blood-volume of 0.750 ml. This permits indirect measurements of the analytes via a dialysis membrane, with electrical separation of the ISE's and the animal. The flow-rates of blood and dialysis-solution were adjusted in such a way that water diffusing from the aqueous dialysis solution into the blood, across the dialysis membrane, does not alter the haematocrit. Polyethyleneglycol-hirudin was used for anticoagulation, since it was superior to heparin. The assembly enables continuous measurements in the living anaesthetized rat over a time period of at least 3 hours.

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Cation selective tubular carrier-PVC-membranes containing polymeric plasticizer with low tendency of migration for Solid State Contact Electrodes

Schindler¹,

Herna²,

Reisinger³

et al. 1994

J. Prakt. Chem.

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Minimization of the acetate interference of calcium-selective carrier-PVC-membrane electrodes for process-controlled haemodialysis

Cited by 7 publications

References 16 publications

Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

Continuous Analysis in Extracorporeally Circulating Blood - A Rat Model Applying Flow-Through Ion-Selective Electrodes for the Measurement of Ca2+, K+, Na+ and pH

Cation selective tubular carrier-PVC-membranes containing polymeric plasticizer with low tendency of migration for Solid State Contact Electrodes

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