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Clinical Chemistry 18: 124-128, 1972;
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Clinical Chemistry, Vol 18, 124-128, Copyright © 1972 by the American Association for Clinical Chemistry

Evaluation for Four Reagent Kits and Two Flame Photometers Used to Determine Sodium and Potassium in Serum

Edward K. Kim 1, Leslie D. Waddell 1, and James E. Logan 1

1 Clinical Laboratories, Canadian Communicable Disease Centre, Department of National Health and Welfare, Ottawa, Ontario, Canada, K1A OK9.

The Stanbio and Medi-Chem sodium and potassium kits were evaluated and the results compared with those obtained with the Coleman Jr. Model 21, NIL 4-7000, and Technicon flame photometers. Day-to-day reproducibility studies and data based on comparative studies with sera from patients revealed that the Stanbio and Medi-Chem sodium kits and the Medi-Chem potassium kit give diagnostically unsatisfactory results. Results with the Stanbio potassium kit were reproducible, but further improvement is required, as indicated by nonspecificity in the analyses of patient sera. Instability of the Coleman Jr. flame photometer made it difficult to obtain acceptable data in these tests, particularly for sodium, while the NIL flame photometer had good precision and accuracy.

Submitted on August 28, 1971
Accepted on October 4, 1971






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Copyright © 1972 by the American Association for Clinical Chemistry.