Gc/ms question

Fellow smokers,

I've been trying to search the forum for a bit of clarification. Does a gc/ms confirmation re-test all substances or just those that failed initial ua? And if your thc isn't detected with the initial test does that give you a good chance of passing the GC/MS ?

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Originally Posted by Close2out

Fellow smokers,

I've been trying to search the forum for a bit of clarification. Does a gc/ms confirmation re-test all substances or just those that failed initial ua?

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Only the panel(s) that have tested "non-negative" on the initial assay screen. So any drug panels that are negative on the initial, will not see the GC/MS. It would be too costly for both the lab and client to run the GC/MS on any panels that tested negative on the initial screen.

And if youre worried about the GC/MS because of its numerically lower cutoff threshold, dont be. Even though their cutoffs numerically differ, a 50 ng assay screen is functionally equivalent to the 15 ng GC/MS. For more info, do an Advanced Search of Posts with the terms "tests functionally equivalent".

Wow thank you so much for your in depth answer. Greatly appreciated!