Identification of Substances Interfering with Illicit Drug Testing

摘要

In response to intensified urine testing for illicit drugs, drug users have attempted to falsify results by several schemes including in vitro adulteration of specimens. Additives that were claimed to invalidate enzyme immunoassay (EIA) drug assays were investigated. An investigation was also undertaken to determine whether adulterated urines could be identified so they might be rejected. At the highest concentration evaluated, the adulterants (NaCl, Visine, Vestal medicated liquid handsoap, liquid Drano, liquid Cholorox bleach, Heinz vinegar, golden seal tea, and Real Lemon concentrated lemon juice) interfered with the drug assays differently.