Cárdenas, S <br/><br/>
Rapid solid-phase extraction/derivatization system for sample preparation and gas chromatographic/mass spectrometric determination of drugs in human urine.  [electronic resource] 

 -  Rapid communications in mass spectrometry : RCM  1997 
 - 298-306 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0951-4198 
<br/><br/><label>Standard No.: </label>10.1002/(SICI)1097-0231(19970215)11:3<298::AID-RCM775>3.0.CO;2-#  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calibration<br/>Gas Chromatography-Mass Spectrometry<br/>Humans<br/>Hydrogen-Ion Concentration<br/>Indicators and Reagents<br/>Pharmaceutical Preparations--analysis<br/>Reference Standards<br/>Reproducibility of Results<br/>Substance Abuse Detection--methods<br/>Urine--chemistry