Abstract
Three new reagents, viz 8-nitro-2-aminonaphthalene-6-sulphonic acid (ammonium salt) and the two nitroaminonaphthalene sulphonic acids (potassium salts) prepared by the mononitration of 2-aminonaphthalene-5-sulphonic acid have been developed as spot tests for stannous tin. Each reagent produces a strong fluorescence under ultraviolet light, less than one microgram of stannous tin being detected under the conditions of test. The application of the reagents to the quantitative estimation of tin is also indicated.
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