Method to prevent urine specimen and other specimen substitution in substance use screening

摘要

Substitution of specimens (such as urine specimens) may be detected and even prevented by adding randomization to the collection and routing of specimens. A test taker is required to ingest an ingestible entity the nature of which is concealed from the test taker and others participating in the collection of the sample. The test-taker and unauthorized personnel collecting and routing the specimen are uninformed about fluorescence behavior (or lack of fluorescence) expected for an unsubstituted specimen. The nature of the ingestible entity that a test-taker must take is randomized, and the nature of the ingestible entity is closely held, such as by using bar coding or by using a marker undetectable by the naked eye.