title: Dependence of the separation of some biological substances on the carbon content of C18 chemically bonded phases.
mesh_terms: D002244:Carbon / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D007202:Indicators and Reagents; D007211:Indoles / Q000302:isolation & purification* / Q000652:urine; D010316:Particle Size; D011687:Purines / Q000302:isolation & purification* / Q000652:urine; D013056:Spectrophotometry, Ultraviolet
chemical_list: D007202:Indicators and Reagents; D007211:Indoles; D011687:Purines; D002244:Carbon