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Ego Trip
acid


Registered: 10/23/14
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Can someone explain GC/MS drug test to me?
#21348705 - 03/01/15 03:31 PM (9 years, 2 months ago) |
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Yes I've tried googling it but I don't understand. From what I understand it is a type of drug test? Why isn't it mentioned for drug detection periods on erowid drug testing vaults?
-------------------- Psychedelics | Information Technology | Philosophy Marijuana, LSD, Psilocybin, Salvia, Kratom, DMT, Alprazolam, MDMA , 2C-B, Ketamine, Methylone, Methylphenidate, Amphetamine, Codeine, Etizolam, MXE, Oxycodone, GHB, Diazepam, 4-aco-dmt, 5-MeO-MiPT, Clonazolam, MDA, PCP, DXM, Ayahuasca
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luvdemboomers
loner with a boner
Registered: 01/11/13
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Re: Can someone explain GC/MS drug test to me? [Re: Ego Trip]
#21348733 - 03/01/15 03:38 PM (9 years, 2 months ago) |
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I'm pretty sure it's just a method of analyzing a substance. Whether it's blood or urine or hair.
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psi
TOAST N' JAM


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Re: Can someone explain GC/MS drug test to me? [Re: Ego Trip]
#21348736 - 03/01/15 03:39 PM (9 years, 2 months ago) |
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It's not just a kind of drug test, it's a general purpose technique in chemistry for identifying substances. http://en.wikipedia.org/wiki/Gas_chromatography%E2%80%93mass_spectrometry
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pslyke
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Re: Can someone explain GC/MS drug test to me? [Re: Ego Trip]
#21348761 - 03/01/15 03:43 PM (9 years, 2 months ago) |
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What do you want to know? GC/MS is an instrument and a type of analysis that is run to examine various different things; one of which is urine for the presence of drugs. The GC stands for gas chromatography. GC involves the separation of complex mixtures when passed through a column. The column may contain one of several different things that will provide affinity/differential retention of various different chemicals based on their chemical properties. Its a method for separating mixtures of chemicals. Once separated the MS, or mass spectrometer is used to characterize the identity of the separated chemicals. It does so by ionizing them, shooting them down a tube and measuring the length of time it takes a particular chemical to fly from one end to the other. That time is a function of the chemical's mass and the charge imparted during ionization. Once you know the mass and mass:charge, one uses enormous data bases built into the instrument or on line to determine the chemical identity and relative quantity in the sample. GC/MS is both sensitive and specific and is really a workhorse of many laboratories.
-------------------- "What appears impenetrable to us does exist, manifesting itself in the deepest wisdom and the most radiant beauty" Einstein "The conservatives of 70 years ago would be outraged at what has come to pass. It embodies everything they took up arms for to defeat"Asante
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moonrockmushy
High on Spite



Registered: 07/01/05
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Re: Can someone explain GC/MS drug test to me? [Re: Ego Trip]
#21348864 - 03/01/15 04:08 PM (9 years, 2 months ago) |
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Basically it means they will send it to a lab versus just using a dipstick or in-house test. Whoever orders the test will be able to test for whatever substances they know of pretty much, and get a readout of the relative blood concentrations. The detection times are going to be the same, and it will depend on the cutoff level for sensitivity of the test. The detection time more has to do with the halflife of the drug than the type of drug test.
edit- Also they cost like $700 rather than dirt cheap for a dipstick test.
Edited by moonrockmushy (03/01/15 04:10 PM)
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Ego Trip
acid


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Re: Can someone explain GC/MS drug test to me? [Re: moonrockmushy]
#21350471 - 03/02/15 12:39 AM (9 years, 2 months ago) |
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Okay, can they only check for substances in urine or can they also use saliva and hair?
-------------------- Psychedelics | Information Technology | Philosophy Marijuana, LSD, Psilocybin, Salvia, Kratom, DMT, Alprazolam, MDMA , 2C-B, Ketamine, Methylone, Methylphenidate, Amphetamine, Codeine, Etizolam, MXE, Oxycodone, GHB, Diazepam, 4-aco-dmt, 5-MeO-MiPT, Clonazolam, MDA, PCP, DXM, Ayahuasca
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pslyke
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Re: Can someone explain GC/MS drug test to me? [Re: Ego Trip]
#21350775 - 03/02/15 05:53 AM (9 years, 2 months ago) |
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They can pretty much use what ever they want. There might be some up front sample handling to prepare each different sample for analysis, but the instrument sees the chemicals regardless of the type of sample.
-------------------- "What appears impenetrable to us does exist, manifesting itself in the deepest wisdom and the most radiant beauty" Einstein "The conservatives of 70 years ago would be outraged at what has come to pass. It embodies everything they took up arms for to defeat"Asante
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