What are adulterants?
Adulteration is the tampering of a urine specimen with the intention of altering the test results, rendering a positive reading into a negative one. Users of illicit drugs have attempted to defeat drug test by adding adulterants to the sample after collection as a way to invalidate the testing procedures. The use of adulterants can cause false negative results in drug test by either interfering with the screening test or converting the drugs present in the urine to other compounds. In addition, some donors try to substitute their specimen with another liquid and others may dilute their specimen by consuming excessive amounts of fluid or by adding water/other liquids to their specimen after collection.
