Volume 24, Issue 3 (July 1979)
Application of the Le Rosen Test to Paint Analysis
Reliable, discriminating spot tests can be important in rapidly determining differences involving paint sample comparisons. Reagents offering high color intensity with a broadranged spectrum obviously produce the best basis for sample analysis. The Le Rosen reaction [1, pp. 137–140] is such a test, offering definitive discrimination of many aromatic compounds. Application of this test to small paint samples offers a clearer differentiation than sulfuric acid  and a wider applicability than diphenylamine-type reagents, both accepted color-solubility tests for paint classifications.