What is a GC MS test?

Gas Chromatography/Mass Spectrometry is as close to being a perfect drug test as it's possible to get. It's done in a computerized machine. It turns the sample to a gas, directs the gas into a little tube, and analyzes the way the components of that gas array themselves in the tube. If I had a properly certified GC/MS unit sitting here and a sample of urine from a known drug user, I could tell it, "evaluate this for THC, cocaine, adulterants, amphetamine and methamphetamine, and PCP" and watch as the machine told me how much of each of those items it found in your sample. It does it all at once, rapidly--a GC/MS can evaluate a sample and produce a report in about a minute and a half--and extremely accurately. This machine is so accurate they have to set lower limits to the screens it does because it can detect weed you smoked weeks ago.

You can't hide from this machine. You can't use something like Urine Luck--that stuff kinda works with the dip stick tests because it produces a chemical that can fool the stick, sometimes, but if you test the same sample on a GC/MS the machine will report the presence of THC and Urine Luck, and then you're doubly screwed--they get you for smoking weed AND for tampering with evidence. If you know you are going to face this machine the only way you can pass the test is to not use drugs. Simple as that.

GC/MS has one problem: it's very expensive. Remember that little tube I told you about? They use a new one for every test, and they're not cheap. The machine isn't cheap, and neither is the operator. They can run thirty dip stick tests for the price of one GC/MS test. This naturally means the lab only wants to put samples they KNOW are hot into the GC/MS, so all GC/MS programs use feeder systems called immunoassays, of which there are three: enzyme-multiplied immunoassay technique, or EMIT; enzyme-linked immunosorbent array, or ELISA; and radioimmunoassay, or RIA--EMIT is the most common, though. ELISA can be used for drug prescreening, but the machines are way more expensive than EMIT units. If you've got a lab that runs a lot of AIDS tests (ELISA is mostly used for HIV) you'd run drug feeder on the ELISA because you've already got the machine, but if you're mostly a drug lab you'd use EMIT. Anyway, they test all the samples on the EMIT unit because it's cheap, and put all the positives in the GC/MS for confirmation.

The moral of this story: if you use drugs and apply for a job to an employer that uses GC/MS testing, you won't get hired no matter what you try.

So dont use drugs without doctors persription.