News|Videos|September 29, 2025

USP Chapters 41 and 1251 Revised: What Analysts Need to Know

Author(s)Will Wetzel
Fact checked by: Caroline Hroncich

As part of our coverage of Analytica USA, Spectroscopy sat down with Ian Ciesniewski, technical director at Mettler Toledo, to discuss the latest changes made to the United States Pharmacopeia (USP) Chapters 41 and 1251. In the below interview segment, Ciesniewski discusses how the recent changes to these two chapters will impact organizations.