Quote Originally Posted by smokez4u2

I am not doubting you but do you know this for fact?

I run urine samples/drug tests but I do run GC/MS samples all the time (surface waters).
Were not talking about surface waters, we are talking about the process of drug testing. As a matter of process, the lab will not run the GC/MS on every drug on a given panel, especially after the drugs being tested have been negative on the initial assay screen. Youve said in your other thread that youve spent $80-$120 dollars just testing your surface waters. Thats considerably higher than what it costs to test for all the drugs on a multipanel assay, and no client would be willing to pay that kind of money, particularly when the client has a good number of employees, recruits, or probationeers to test. For the sake of S&G's, if the lab were to GC/MS all of the drugs on a given panel, why bother with the initial assay?

There is such a thing as a medical panel (several, actually) that can test for as many as 50 - 75 different specific drugs and derivitives of drug bases. To be able to test for all, they still need to do assay on all of them, because it would run in the hundreds, if not thousands of dollars to do a GC/MS on all of them.

Drug tests just arent conducted in that manner. Youre speaking apples, Im speaking oranges. Drug testing is not CSI, despite what youre led to believe.