title: High-performance liquid chromatography of paraquat and diquat in urine with rapid sample preparation involving ion-pair extraction on disposable cartridges of octadecyl-silica.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods; D004178:Diquat / Q000652:urine*; D006801:Humans; D010269:Paraquat / Q000652:urine*; D011726:Pyridinium Compounds / Q000652:urine*; D012822:Silicon Dioxide
chemical_list: D011726:Pyridinium Compounds; C026679:octadecylsilica; D012822:Silicon Dioxide; D004178:Diquat; D010269:Paraquat