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Grauwiler SB, Drewe J, Scholer A. 
“Sensitivity and specificity of urinary cannabinoid detection with two immunoassays after controlled oral administration of cannabinoids to humans”. 
Ther Drug Monit. 2008 Aug 07;30(4):530-5.
Abstract
For forensic and clinical toxicologic purposes, cannabis consumption is screened using easy-to-handle immunoassays. The sensitivity and specificity of these immunoassays have not yet been established in samples from volunteers receiving oral synthetic tetrahydrocannabinol or cannabis extracts using liquid chromatography-mass spectrometry/mass spectrometry as the reference method. Urine samples were collected in an open, randomized, single-center, three-period crossover study including 18 healthy male volunteers given either 20 mg synthetic tetrahydrocannabinol (Marinol) as a control substance or five different types of Cannabis sativa extracts.
Comments and Responses to this Article
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Status: display
earth
Apr 17, 2011 1:59
Only 72 hours. #

This is a great start, but they only test the results for 72 hours post administration, so it is not of much interest when looking at detection times.
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