TY  - SER
AU  - Megn,Qing Cheng
TI  - High-performance liquid chromatographic determination of morphine and its 3- and 6- glucoronide metabolites by two-step solid-phase extraction
Sources  - Journal of Chromatography B
Sources  - 742 (1) 2000 " 115-123
ISSN  - 0378-4347
ER  -