Bridging analytical and preparative HPLC, this blog shows how NanoPak‑C all‑carbon columns withstand tens of thousands of column volumes at pH 8.5 in GLP‑1 methods. By expressing alkaline-pH exposure in column volumes, we model NanoPak‑C stability for scale-up from analytical to semi‑prep and prep purification of Semaglutide, Liraglutide, and other peptide drugs.