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Detection of iodine, bromine, arsenic(III), tin(II), mercury(II), silver, thiosulphate, and sulphite using setoglaucine O and setocyanine supra

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Summary

Setoglaucine O and Setocyanine Supra can be employed for the detection of iodine, bromine, arsenic(III), tin(II), mercury(II), silver(I), thiosulphate and sulphite. The method for iodine or bromine consists of treating 0.05 ml of 0.01 % solution of Setoglaucine O or Setocyanine Supra on the spot plate, with 0.05 ml of iodine or bromine solution, and diluting the mixture to 0.5 ml. Colour changes are blue to yellow green for iodine and blue to pale yellow for bromine. The tests for arsenic(III), tin(II), mercury(II), silver(I), thiosulphate and sulphite consist of treating 0.1 ml of 0.01 % Setoglaucine O or Setocyanine Supra with 0.05 ml of iodine in potassium iodide and 0.05 ml of the test solution, and diluting to 1 ml. The solution assumes the original blue colour of the dye in the presence of these ions.

Zusammenfassung

Setoglaucin O (I) und Setocyanin Supra (II) eignen sich für den Nachweis von Jod, Brom, Arsen(III), Zinn(II), Quecksilber(II), Silber(I), Thiosulfat und Sulfit. Zum Nachweis von Jod oder Brom werden 0,05 ml einer 0,01% igen Lösung von I oder II auf einer Tüpfelplatte mit 0.05 ml Jododer Bromlösung versetzt und auf 0,5 ml verdünnt. Die blaue Farbe ändert sich bei Anwesenheit von Jod nach gelb-grün, bei Anwesenheit von Brom nach blaßgelb. Zum Nachweis von As(III), Sn(II), Hg(II), Ag(I), S2O3 2− oder SO3 2− versetzt man 0,1 ml einer 0,01%igen Lösung von I oder II mit 0,05 ml KJ.J2 und 0,05 ml Probe und verdünnt auf 1 ml. Bei Gegenwart der genannten Ionen tritt die ursprüngliche Blaufärbung des Farbstoffes wieder auf.

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Dutt, V.V.S.E., Rao, N.V. Detection of iodine, bromine, arsenic(III), tin(II), mercury(II), silver, thiosulphate, and sulphite using setoglaucine O and setocyanine supra. Mikrochim Acta 62, 295–300 (1974). https://doi.org/10.1007/BF01219690

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  • DOI: https://doi.org/10.1007/BF01219690

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