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02-09-2006, 12:31 AM
| #1 |
| New Member Join Date: Feb 2006
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|  Can someone explain 50ng/cl?? What exactly does 50 ng/cl mean? Is it possible to have traces of THC metabolites in your system but no enough to register 50 ng/cl? If a screening shows 40 ng/cl would you pass or does it just not show up if under the 50 ng/cl. Just trying to get clarification on this. Thanks |
 
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02-09-2006, 12:51 AM
| #2 |
| Buddhist Curmudgeon   Join Date: Aug 2004
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| It's 50 ng/ml, not 50 ng/cl. If means that you have 50 nanograms (0.000000050 grams) or more of THC metabolites in every milliliter of urine. All drug tests have cutoffs because trace amounts of almost anything can be found in the human body if you look closely enough. On immunoassay tests, the ones with the 50 ng/ml cutoff, if you fall below that threshold there is no indication that you have anything in your system. The GC/MS tests that they use to verify a positive on an immunoassay test has a cutoff of 15 ng/ml. The difference is only in the number. The GC/MS looks at only one THC metabolite while the immunoassay looks at 31. The cutoffs are actually equivalent.
__________________ 60% of the people of America now say we are heading toward a depression. Not a recession, a depression. We are in desperate need of profitable industries that we can tax. Um... Now can we legalize pot? ~ Bill Maher |
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