Anyone know what this means

[hypersmoker]

I have to take a UA for Quest and where it says drug test to be performed, it says; 6633N SAP 10-50 GC/MS ?

[Burnt Toast]

The code you described is a screen that checks for 10 types of drugs with a 50 ng/ml cutoff limit for THC. The GC/MS is only done if any of the 10 panels test positive on the initial screen. Therefore, if you test negative on all ten panels of the initial screen, no GC/MS test will be done and the testing process is over as a "pass".