Summary
Empirical trials were performed to test the suitability of three detergents, Versene, Tergitol 7, and Solvadine K as reagents in spot analysis. Versene gives a specific test for gold, which was found quite reliable and simpler than most of the other spot tests described. When working with large drops on spot paper, the purple to violet spot is still obtained with 50γ gold; limiting concentration = 1 : 1000.
Zusammenfassung
Die Eignung dreier Dispersionsmittel, nämlichVersene, Tergitol 7 undSolvadine K, als Reagenzien in der Tüpfelanalyse wurde durch Versuche geprüft. Es wurde gefunden, daßVersene ein gut spezifisches Reagens für Gold ist, dessen Verwendung verläßlicher und einfacher ist als die meisten anderen für Gold empfohlenen Proben. Wenn man mit großen Tropfen (0,05 ml) auf Tüpfelpapier arbeitet, geben noch 50γ Gold die charakteristische blaurote bis violette Färbung. Die Grenzkonzentration ist 1 : 1000.
Résumé
La spécificité de trois milieux de dispersion pour l'analyse à la touche a été étudiée et confirmée. Ils'agit duVersene, duTergitol 7 et de laSolvadine K. Le Versene est un bon réactif spécifique de l'or. Son emploi est plus sûr et plus simple que celui de la plupart des autres réactifs recommandés dans le cas de l'or. De grosses gouttes (0,05 ml) déposées sur papier à touches donnent encore la coloration rouge-bleue à violette caractéristique pour 50 gammas d'or. Le limite de dilution est 1 : 1000.
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Literature
F. Feigl, Specific and Special Reactions. Elsevier Book Company, New York, N. Y., 1940, p. 95.
For supplying the reagents used in this work we are indebted to several companies, to be specific, to the Bersworth Chemical Company, Framingham, Mass, for the Versene; to the Ciba Company, Inc., New York 14, N. Y., for the Solvadine K; and to the Carbide and Carbon Corporation, New York 17, N. Y., for the Tergitol 7.
F. Feigl, Spot Tests, 3rd ed. Elsevier Book Company, New York, N. Y., 1946, p. 100.
F. Feigl, Specific, Selective, Sensitive Reactions. Academic Press, New York, N. Y., 1949, p. 659.
Foster Dee Snell &F. M. Biffen, Commercial Methods of Analysis. McGraw-Hill Book Company, New York, N. Y., 1944, p. 96.
Welcher, Organic Analytical Reagents, 4 vols., D. D. Van Nostrand, New York, N. Y., 1947–48.
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Dr.Hynes, for many years a contributor to “Mikrochemie”, died on August 22, 1949 after a brief illness. The work reported here was begun under his inspiration, and concluded with the aid and direction of his colleague, Dr.Yanowski.
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Hynes, W.A., Yanowski, L.K. & Ransford, J.E. Versene used as a spot reagent for gold. Mikrochim Acta 35, 160–163 (1950). https://doi.org/10.1007/BF01460585
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DOI: https://doi.org/10.1007/BF01460585