Laboratory Evaluation of the TDx Assay for Detection of Cannabinoids in Urine from Prison Inmates
- 1 November 1988
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Analytical Toxicology
- Vol. 12 (6) , 319-321
- https://doi.org/10.1093/jat/12.6.319
Abstract
The TDx (Abbott Laboratories) and the EMIT-Cobas (Syva Corp. & Roche) techniques for cannabinoid assay were evaluated. Authentic urine samples submitted for narcotics screening were analyzed for cannabinoids. All positive findings were confirmed by an HPLC procedure. The results indicated that the EMIT assay detects a few more positive samples, but also yields a higher rate of unconfirmed positive results compared to the TDx. Those additional “true” positives by EMIT had concentrations of the Δ9-THC-11-carboxylic acid below 10 ng/mL.This publication has 3 references indexed in Scilit:
- Evaluation of TDx Cocaine Metabolite AssayJournal of Analytical Toxicology, 1987
- Fluorescence polarization immunoassay evaluated for screening for amphetamine and methamphetamine in urine.Clinical Chemistry, 1987
- Direct injection of urine on a high-performance liquid chromatographic column-switching system for determination of Δ9-tetrahydrocannabinol-11-oic acid with both ultraviolet and electrochemical detectionJournal of Chromatography B: Biomedical Sciences and Applications, 1987