Quote Originally Posted by Burnt Toast
That because youve mentioned zinc as an "adulterant". When you spike a urine sample with an agent thats known to destroy drug metabolites, thats referred to as adulteration in the eyes of the DHHS.

According to the article in your first link, the ingesting of zinc interferes with the function of the Immunoassay, in much the same way aspirin used to interfer with the function of the first-generation EMIT screen. Theres no evidence that zinc has any effect on THC metabolites in ones body.
Yes, I get that the zinc was found to trick the I/A. It was interesting to see that in 2011, the zinc was undetectable in the sample of diluted urine. I started the job today, they only seemed interested in me agreeing not to have a firearm on their property. I may have 90 days for nature to do it's thing with the metabolites. I am 17 days, and counting on abstinence.

When I get time, I will do some research and see if the spot check for the presence of zinc has been widely incorporated.

Thank you for your patience.

You guys have a wonderful community, and I will endeavor to be a thoughtful contributor.