However, in all cases, the actual, suspected, cause of false urine test results appears as the presence of metabolites from other anabolic steroids. Current urinalyses can typically and effectively determine the exact steroid used. The ratio of the two remaining nandrolone metabolites are analyzed to get the determination. Mass spectrometry is currently used to determine drug use. This technique analyzes activity of singular spectrum of the atom or molecule masses within a sample which have been ionized. Then, the mass-to-charge ratios are measured. It is a technique used to detect small samples of Decabol in urine samples, which have been effective, due to Decabol’s unique molar mass.