Quick Guide
Quick Guide to USP Designations for HPLC Column
The US Pharmacopeia (USP) is a standard source for many pharmaceutical methods. The USP specifies columns by packing materials rather than by manufacturer. The USP has updated its L1 definitions, listed below you will see the most recent definitions and columns that apply. Rapid Resolution High Throughput (RRHT) columns are now choices in the L1, L7, and L11 categories.