Patrick Selig, Accreditation Manager, Author at the ANSI Blog

Female scientist pouring chemical into beaker before preparing reference material and certified reference material.

Reference Material (RM) vs Certified Reference Material (CRM)

July 29, 2022July 29, 2022Patrick Selig, Accreditation Manager

ISO/IEC 17025 accredited laboratories use Reference Materials, or RMs, and Certified Reference Materials, or CRMs, in a variety of ways. RMs and CRMs can be […]

The Importance of Sampling in Testing

October 15, 2020September 8, 2021Patrick Selig, Accreditation Manager

The importance of sampling in testing can’t be overstated. And environmental sampling leads the way with sample collection procedures at the forefront in the face […]