HPLC samples to be analyzed with column packed with < 3µm materials and GC, SFC, CE, GPC, and Flash samples. 0.22 µm. General samples that contain fine particulate matter prior to GC, SFC, CE, GPC, and Flash samples, and sterile-filtration. 0.22 µm. Gas, liquid sample and solvent prior to GC, LC/MS and UHPLC, and other methods sensitive to