TY  - RPRT
TI  - Evaluation of solid-phase extraction method for codeine and morphine in urine using Cerex Polycrom Clin II columns and the Speedisk 48 pressure processor at a high-throughput forensic drug-testing laboratory.
AU  - Melissa M Churley
AU  - Timothy P Lyons
AU  - Paul V Robandt
AU  - Mark R Bruins
PY  - 2003
DO  - 10.1093/jat/27.7.530
UR  - https://pubmed.ncbi.nlm.nih.gov/14621676/
ID  - 14621676
ER  -