Why are steroids screened by GC/MS?
Most steroids break down in the body into multiple metabolites that are excreted in urine at low concentrations. These substances are similar to each other and to the endogenous steroids, normally present in urine in higher concentrations. RTL performs GC/MS screening for the Steroid/Sports Drug Test because it provides an efficient separation and specific detection of individual compounds. The GC/MS confirmation procedure is specific to each individual steroid. For multiple positive screens, multiple individual confirmations are set up. Specimens that screen positive are also confirmed by GC/MS using a separate aliquot of urine.
