Urine Adulteration
Adulteration is the intentional tampering with a urine sample by the donor to avoid detection of illicit drug use. Successful adulteration produces a false-negative drug test result.
Using a urine Specimen Validity Test can help assure the integrity of the urine sample. One of the best ways to test for adulteration or dilution is to determine certain urinary characteristics such as creatinine (CRE), pH, and specific gravity (SG) and to detect the presence of glutaraldehyde (GLUT), nitrite (NIT) and oxidants (OX) in urine.