In a recent article in this journal, Rodriguez-Garcia et al.[1] reported about transferability of
results for serum sodium and potassium between different analysers. Four of the seven …

With the pending new CLIA regulations, the issue of standardization has become more
important. AACC's efforts in the areas of standardization and development of standard …

Ion-selective electrodes (ISEs) respond to ion-activity and therefore do not sense substance
concentration directly. However, it is recognized that sodium and potassium in plasma will …

Ion-selective electrodes (ISEs) make possible the measurement of a wide range of analytes,
which cover such diverse substances as ions, dissolved gases, enzymes etc. in serum …

An automated analyzer for the measurement of potassium and sodium in whole blood has
been developed and evaluated. The sensors used in this instrument are the sodium glass …

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 International Federation of Clinical Chemistry (FCC) and the National Committee for
Clinical Laboratory Standards (NCCLS) are about to recommend to adjust sodium and …

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 …

In principle, flame photometry measures substance concentration, and ion-selective
electrodes (ISEs) measure ion activity. However, the situation regarding the comparison of …

Three interlaboratory round-robin studies (RR1, RR2, and RR3) were conducted to identify a
serum-based reference material that would aid in the standardization of direct ion-selective …