Evaluation of a Radioimmunoassay (125I) Kit for Cannabinoid Metabolites in Urine and Whole Blood*

Abstract
The Abuscreen® kit (Roche Diagnostics) for the analysis of 11-nor-Δ9-tetrahydrocannabinol-9-carboxylic acid and other cannabinoids in urine was evaluated in terms of its accuracy, reproducibility, and sensitivity. A procedure is also presented for the analysis of total cannabinoids in whole blood using the RIA kit.