CLSI C29

Standardization of Sodium and Potassium Ion-Selective Electrode Systems to the Flame Photometric Reference Method, 2nd Edition

This standard contains recommendations for the expression of results of ion-selective electrode measurement of sodium and potassium ion activities in undiluted serum, plasma, or whole blood in clinical practice.

This document is available in electronic format only.

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Chairholder: Paul D'Orazio, PhD

Date of Publication: October 1, 2000

Order Code PDF: CLSI C29A2E
ISBN Number: 1-56238-410-4

Order Code Print: print not available

Edition: Second

Pages: 44

CLSI C29 Additional Details

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The U.S. Food and Drug Administration (FDA) has evaluated and recognized this approved-level consensus standard for use in satisfying a regulatory requirement.

This document was formerly sold under the code I09.

This archived document is no longer being reviewed through the CLSI Consensus Document Development Process. However, this document is technically valid as of September 2016. Because of its value to the laboratory community, it is being retained in CLSI’s library.

CLSI C29 Abstract

Standardization of Sodium and Potassium Ion-Selective Electrode Systems to the Flame Photometric Reference Method; Approved Standard—Second Edition (CLSI document C29-A2) offers a protocol for standardizing instruments that contain direct ion-selective electrodes to give results in concentration terms that are verifiable to the reference method (flame photometry) for specimens with normal plasma water (i.e., lipids and proteins). The document describes the preparation of serum pools to carry out the procedure. Laboratories without the resources, equipment, or personnel to prepare the pools can purchase them from the National Institute of Standards and Technology (Gaithersburg, MD). It is recommended in C29-A2 that the accuracy of each new direct potentiometric instrument be verified with these standard pools, together with the flame photometer, if it is also used to report patient results.