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Clinical Chemistry 21: 850-852, 1975;
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Clinical Chemistry, Vol 21, 850-852, Copyright © 1975 by the American Association for Clinical Chemistry

Evaluation of the Revised Serum Calcium Procedure Used with the Du Pont Automatic Clinical Analyzer

Gloria Welt Sage 1, David LeFever 1, and John Bernard Henry 1

1 Department of Pathology, Upstate Medical Center State University of New York, 750 E. Adams St., Syracuse, N. Y. 13210.

We evaluated a revised serum calcium method (o-cresolphthalein complexone) used with the Du Pont aca. Our results correlated well with those obtained by atomic absorption spectrometry. Within-run and day-to-day coefficients of variation were 0.5 and 1.5%, respectively. Color produced and calcium concentration are linearly related and the relation is not affected by hemolysis, lipemia, or icterus.


Key Words: reference values • o-cresolphthalein complexone reagent • atomic absorption spectrometry

Submitted on January 24, 1975
Accepted on March 24, 1975






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Copyright © 1975 by the American Association for Clinical Chemistry.