TY  - RPRT
TI  - Rapid solid-phase extraction/derivatization system for sample preparation and gas chromatographic/mass spectrometric determination of drugs in human urine.
AU  - S Cárdenas
AU  - M Gallego
AU  - M Valcárcel
PY  - 1997
DO  - 10.1002/(sici)1097-0231(19970215)11:3<298::aid-rcm775>3.0.co;2-#
UR  - https://pubmed.ncbi.nlm.nih.gov/9077000/
ID  - 9077000
ER  -