Sequential extraction of amphetamines, opiates, and 11-nor-Δ9-tetrahydrocannabinol-9-carboxylic acid from a limited volume of urine using a monolithic silica spin column coupled with gas chromatography–mass spectrometry
Titel:
Sequential extraction of amphetamines, opiates, and 11-nor-Δ9-tetrahydrocannabinol-9-carboxylic acid from a limited volume of urine using a monolithic silica spin column coupled with gas chromatography–mass spectrometry