Abstract
AbstractHydrogen sulphide is recommended for precipitating tin, in the presence of cadmium, from acid tartrate solution of titanium. The resulting sulphides can be dissolved in acid and the colour produced by interaction between tin and dithiol can be measured on a photoelectric absorptiometer if Teepol X is added to produce an efficient dispersion. This system obeys Beers' Law up to a concentration of tin of at least 16 μg. per ml. and remains stable for at least three hours. Molybdenum interferes and ‘thionalide’ is not suitable as a precipitant.
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