TY  - JOUR
PY  - 1990//
TI  - Solid-phase extraction, identification, and quantitation of 11-nor-delta-9-tetrahydrocannabinol-9-carboxylic acid
JO  - Journal of forensic sciences
A1  - Nakamura, G. R.
A1  - Meeks, R. D.
A1  - Stall, W. J.
SP  - 792
EP  - 796
VL  - 35
IS  - 4
N2  - A procedure has been developed to extract and recover minute amounts of delta-9-carboxytetrahydrocannabinol (THC-COOH) from urine. A new non-isotopic internal standard is introduced to permit a chromatographic assay of the metabolite. The method affords a 91% recovery of 20 ng/mL of the THC-COOH acid from spiked urine with the assurance of a 3.8% coefficient of variation.<p />  <p>Language: en</p>
LA  - en
SN  - 0022-1198
UR  - http://dx.doi.org/
ID  - ref1
ER  -