First a standard drug is run through the machine and a base line is developed. Then a random sample is run and if it matches the peaks of the standard, then you have tested positive.
The technique of GC-MS can not only detect anabolic steroids but thousands of other pharmaceutical products. The synthetic anabolic steroids that can be detected with the present system include the following:
Anabolic Steroid................Detection times
Anavar........................3 weeks
boldenone.....................5 months
Clenbuterol...................4 days
Durabolin (nandrolone)........12 months
Deca Durabolin................18 months
Equipose......................4-6 months
Finaplex (trenbolone..........4-6 months
Ganabol.......................4-6 months
Halotestin....................2 months
Maxigan.......................4-6 months
19 Norandrosterone............12 months
Nilavar (norathandrolone).....5-6 weeks
Oxandrolone...................3 weeks
Oxymetholone..................2 months
Parabolan.....................4-6 weeks
Primobolan....................4-6 weeks
Proviron (Mesterolone)........5-6 weeks
Stanozolol....................21 days
Sustanon......................3 months
testosterone undecanoate......7-12 days
testosterone propionate.......2 weeks
testosterone cypionate/enanthate3 months
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