TY - GEN AU - Cárdenas,S AU - Gallego,M AU - Valcárcel,M TI - Rapid solid-phase extraction/derivatization system for sample preparation and gas chromatographic/mass spectrometric determination of drugs in human urine SN - 0951-4198 PY - 1997///0429 KW - Calibration KW - Gas Chromatography-Mass Spectrometry KW - Humans KW - Hydrogen-Ion Concentration KW - Indicators and Reagents KW - Pharmaceutical Preparations KW - analysis KW - Reference Standards KW - Reproducibility of Results KW - Substance Abuse Detection KW - methods KW - Urine KW - chemistry N1 - Publication Type: Journal Article; Research Support, Non-U.S. Gov't UR - https://doi.org/10.1002/(SICI)1097-0231(19970215)11:3<298::AID-RCM775>3.0.CO;2-# ER -