Comparison of a Colorimetric Potassium Method with Flame Photometry and Ion-Selective Electrodes
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چکیده
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Determination of sodium and potassium with ion-selective electrodes.
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 heparin) than for plasma, serum, or capillary blood. The results for K+ were higher for serum than for whole blood, and higher for whole blood than for plasma. The latter difference was apparently due to release of K+ during...
متن کاملContinuous-recording flame photometry of sodium and potassium in serum.
Serum sodium and potassium analyses by continuous-flow flame photometry is a well-accepted procedure (1, 2). Recently Habig and Williamson (3) have used the widely available Instrumentation Laboratory Model 143 (IL-143) flame photometer for continuousflow analyses. Pennacchia et al. (4) have operated this flame photometer at rates as high as 120 samples per hour. In both systems the results app...
متن کاملSemimicro flame photometry of serum sodium and potassium.
BE PIONEER WORK of Lundegardh (1) established flame photometry as an analytical technic, but widespread interest was not aroused until 1945, when Barnes et al. (2) described a simple instrument which was much faster and at least as accurate as existing chemical methods for the determination of certain metals. A dormant clinical interest in the measurement of serum sodium and potassium was there...
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ژورنال
عنوان ژورنال: Annals of Clinical Biochemistry: International Journal of Laboratory Medicine
سال: 1991
ISSN: 0004-5632,1758-1001
DOI: 10.1177/000456329102800418