title: Recent advances in automated sample preparation of biological materials for high-performance liquid chromatographic analysis.
mesh_terms: D001331:Automation; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D012822:Silicon Dioxide; D012995:Solubility; D013806:Theophylline / Q000032:analysis
chemical_list: D012822:Silicon Dioxide; D013806:Theophylline