What is the Duquenois-Levine Test used for?

The Duquenois-Levine Test is specifically designed as a field test for marijuana. This test utilizes specific chemical reagents that react with cannabinoids, resulting in a color change that indicates the presence of cannabis. It is a rapid and practical method used primarily by law enforcement in the field to screen for marijuana before any further testing is conducted in a lab setting.

The nature of the Duquenois-Levine Test makes it distinct from tests that focus on THC content, as it does not quantify THC levels but rather confirms the presence of marijuana. Additionally, the test is not suitable for identifying synthetic drugs or testing the purity of samples; other methods and tests are employed for those specific purposes. The simplicity and effectiveness of the Duquenois-Levine Test make it an essential tool in narcotic investigations dealing with marijuana.