For the presumptive identification of Heroin, Black Tar, Codeine and Morphine. Easier to distinguish between the four Opiates than using Test B. Test can be used to screen out Methapyrilene and Propoxyphene.
Lieberman’s Reagent is used for the general screening to presumptively identify PMA, Ketamine, Barbiturates and Methadone. This test is used after a Brown result in Test A, or a clear result in Test A followed by no change in Test G.