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Título: Duquenois-Levine Test.
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Duquenois-Levine Test: Step 2: Addition of hydrochloric acid. The Duquenois reagent is used in the Rapid Modified Duquenois–Levine test, an established screening test for the presence of marijuana. The test was initially developed in the 1930s by Pierre Duquenois, and was adopted in the 1950s by the United Nations as the preferred test for cannabis.
Crédito: Album / Universal Images Group / Universal History Archive
Tamaño imagen: 4192 × 5003 px | 60.0 MB
Tamaño impresión: 35.5 × 42.4 cm | 1650.4 × 1969.7 in (300 dpi)