title: [On the preparation of sterile and pyrogen-free column].
mesh_terms: D002845:Chromatography / Q000295:instrumentation*; D004926:Escherichia coli / Q000032:analysis; D007962:Leukocytes / Q000032:analysis; D008722:Methods; D011749:Pyrogens / Q000302:isolation & purification*; D012313:RNA / Q000032:analysis; D013242:Sterilization; D015003:Yeasts / Q000032:analysis
chemical_list: D011749:Pyrogens; D012313:RNA