Nitrites is tested as well as creatinine, pH, and specific gravity since theyre all in one validity test kit (do a Google search for drug adulteration test kits).


Nitrites are found in some drop-in additives (depending on brand) used to spike a urine sample. Nitrites are also found in foods such as pork and poultry. The human body can also produce nitrites naturally, though this is a sign of a urinary tract infection. For this reason, only a tiny amount of nitrites can be permitted in a urine sample.

Under current DHHS regulations, any urine sample with a nitrites level over 500 mcg/ml (micrograms per milliliter) is considered "forensically defensible" as proof of adulteration.