RT Journal Article SR Electronic T1 Automated estimation of sodium, potassium, and calcium using the Eppendorf flame photometer JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 240 OP 243 DO 10.1136/jcp.18.2.240 VO 18 IS 2 A1 Bold, A. M. A1 Hurst, R. J. A1 McSwiney, R. R. YR 1965 UL http://jcp.bmj.com/content/18/2/240.abstract AB An Eppendorf flame photometer may be used to estimate sodium, potassium, and calcium in plasma which has been automatically sampled and diluted. Readings may be automatically recorded by feeding the output from the photomultiplier into a sensitive recorder. This method estimates 60 samples an hour, using approximately 0.12 ml. plasma per estimation. The accuracy of the method is discussed.