title: Differences in retention of protein amino acids by C18 Sep-Pak cartridges.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D000818:Animals; D002417:Cattle; D002852:Chromatography, Ion Exchange; D006868:Hydrolysis; D007785:Lactose / Q000032:analysis; D011506:Proteins / Q000032:analysis*
chemical_list: D000596:Amino Acids; D011506:Proteins; D007785:Lactose