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  • Title: A method of sodium and potassium determination in red cells with a simple cell separation technique.
    Author: Drygieniec D, Jabłońska-Skwiecińska E, Kozakowska E.
    Journal: Folia Haematol Int Mag Klin Morphol Blutforsch; 1982; 109(5):798-803. PubMed ID: 6188667.
    Abstract:
    Heparinized blood was centrifuged repeatedly in Eppendorf's test tubes at 7,500 g in the Unipan microcentrifuge type 320. Packed red cells were hemolysed, then sodium and potassium were determined by means of the flame photometer. The percentage of trapped plasma determined with indocyanine green amounted to on average 1 per cent. There was a good precision of the method controlled on 20 aliquots of the same blood sample. Results of red cell sodium and potassium in 80 healthy volunteers were 10.42 +/- 1.56 mmol/l and 87.8 +/- 4.03 mmol/l respectively. No significant changes in the red cell sodium and potassium concentration were observed in heparinized blood during 5 hours storage at room temperature. The method cannot be used interchangeably with the method of Helbock and Brown, since the correlation coefficients were too low in parallel examinations.
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