The electrochemical cell can be traced back to the work of Volta and Galvani in the late 18th
and early 19th centuries. However, it was over 100 years later before the scientist now …

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

An increasing number of clinical laboratoriesare using direct potentiometric analysers for the
measurement of sodium and potassium in whole blood, plasma and serum. Apart from being …

A potentiometric analyzer, developed to directly measure potassium and sodium
concentrations, was evaluated on aqueous solutions, whole blood, serum, and plasma. The …

The mean difference of 3.6 mmolfL differs significantly from the authors' reported mean
difference of 5.6 mmolfL. The results in our laboratory for these samples were about 1 …

We present an improved Na+-selective liquid membrane electrode for measurement of Na+
concentrations in both undiluted serum and urine. The values for urinary Na+ obtained with …

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 …

Six automated instruments that measure sodium and potassium were tested for interference
from two compounds used in catheters. Tridodecylmethylammonium heparin did not …

System 501 Na/K direct potentio-metric analyzer (Instrumentation Laboratory Inc.,
Wilmington, MA 01887) or a Corning Na/K 902 direct potentiometric analyzer (Corning …

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