We compared different sample-handling techniques for measurement of Na+ and K+ with
ion-selective electrodes (ISE). Imprecision was less for venous blood (with a minimum of …

For clinical purposes the activities of Na+ and K+ obtained with ion-selective electrodes in
undiluted whole blood or serum should be multiplied by an appropriate factor to obtain the …

American Hospital Supply (UK) Ltd., Didcot, Oxon. An instrument supplied for a trial period in
our laboratory produced results for plasma and serum so-dium that differed significantly from …

Abstract The Beckman Electrolyte 2 Analyzer (E2A) has been studied for its response to
sodium and potassium content in various laboratory prepared pH-adjusted mixtures of metal …

A new liquid ion-exchange electrode is described which has a selectivity for K+ over Na+ of
93: 1 in 0.1 mol/kg solutions. Its response is Nernstian in the range 5 x 10-4 to 5 x 10-1 mol …

The advent of ion-selective electrodes made possible the potentiometry of sodium in serum
and plasma. These methods were based on dilution of serum, as done in flame photometry …

Method Sodium and potassium concentrations were measured in both whole blood and
plasma from a series of 21 patient samples using a Corning 902 ISE. The difference …

The determination of sodium and potassium in serum will be performed in the near future
mainly by ion-selective electrodes. When the samples are highly diluted before …

The CVs of the enzymatic methods are considerably higher (CV 1.2%; 0.7-1.5%; C” T 1.3-
2.0%), and the CV values are affected by both CV and CIT0 contributions. In addition, the …

Biomedical, Newton, MA) ion-selective electrode type of analyzer relative to that obtained
with flame photometry. They were concerned because their results were in disagreement …