CLSI EP07

Interference Testing in Clinical Chemistry, 3rd Edition

This guideline provides background information, guidance, and experimental procedures for investigating, identifying, and characterizing the effects of interferents on clinical chemistry test results.

Supplemental data for EP07 is now accessible through the EP37 database.

This edition of the document was corrected in July 2018 and March 2021. Read the correction notices by accessing the link above, and learn more about our correction process here.

This reaffirmed document has been reviewed and confirmed as suitable to remain published without revision to content, as of October 2022. The document’s next scheduled review is generally five years after the reaffirmation date.

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Chairholder: Robert J. McEnroe, PhD

Date of Publication: April 30, 2018

Order Code PDF: CLSI EP07Ed3E
ISBN Number: 1-56238-847-9

Order Code Print: CLSI EP07Ed3
ISBN Number: 1-56238-846-0

Edition: Third

Pages: 122

CLSI EP07 Additional Details

A guideline for global application developed through the Clinical and Laboratory Standards Institute consensus process.

CLSI EP07 Abstract

Clinical and Laboratory Standards Institute guideline EP07—Interference Testing in Clinical Chemistry is intended to promote uniformity in the evaluation of interference characteristics of medical laboratory measurement procedures. EP07 describes procedures to screen potential interferents, quantify interference effects, and confirm interference in patient samples. This guideline also describes procedures for medical laboratories to verify interference claims and investigate discrepant results caused by unsuspected interferents. Detailed examples are given. EP07 also contains background information on interference testing concepts. Tables of recommended test concentrations for potential interferents can be found in the supplement, CLSI document EP37.