Presumptive tests mescaline

A number of difficulties are associated with colour tests on fresh and dried plant material, in addition to those associated with analysing a primary amine such as mescaline. These include the fact that the plant material itself may obscure the colour reaction that takes place. Furthermore, a wide range of primary phenethy-lamines and amphetamines may yield similar colour reactions. The presumptive test which can be satisfactorily used is the Marquis test (see Appendix 1). Positive and negative control tests should also be carried out. An orange-red colour will develop if mescaline is present. However, due to the difficulties associated with interpretation of such results, further confirmation of the presence of mescaline, by using chromatographic and spectroscopic techniques, is required. 

Physical Description and Sampling of Materials Presumptive Tests for Mescaline TEC Analysis of Mescaline HPLC Analysis of Mescaline GC-MS Analysis of Mescaline Comparison of Peyote Samples... 

Mandalin tast A presumptive test for amphetamines and alkaloids. The Mandelin recent is a 1% solution of ammonium vanadate (NH4VO3) in concentrated sulphuric acid. Different substances j e different colours. Mescaline, for example, produces an orange colour, heroin abrown colour, and amphetamine ablue-green colour. 

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