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PT Instructions

Choose a Study and Catalog below to download ERA’s current proficiency testing study instructions.
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NELAC Fields of Proficiency Testing Tables

The NELAC FoPT tables contain the concentration ranges, acceptance limits and PTRLs for all analytes included in the NELAC PT program. If you have any questions about these tables or any other aspect of NELAC proficiency testing, please call ERA at 1-800-372-0122.

Click here to view the tables on the NELAC website.