Membrane separation pilot testing provides critical data for scaling‑up purification of botanical extracts and biopharmaceutical liquids. This article presents lab trial samples including crude extract, 10% methanol permeate, heparin sodium permeate and finished plant extract. Visual liquid comparison demonstrates membrane performance on impurity removal, decolorization and solvent compatibility. Pilot tests reduce industrial project risks and offer an energy‑saving alternative to conventional purification processes. Custom test services are available for customer‑specific feedstock.