Tellurium: A New Sensitive Test

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Science  05 Jul 1963:
Vol. 141, Issue 3575, pp. 42-43
DOI: 10.1126/science.141.3575.42


A new, extremely sensitive method for the quantitative determination of tellurium is based on the induced precipitation of elemental gold from a 6N HCl solution containing gold chloride, cupric chloride, and hypophosphorous acid; the amount of gold reduced is proportional to the amount of tellurium present. As little as 1 nanogram (1 X 1O-9 g) of tellurium gives a measurable reaction with 1 mg of gold in 50 ml of solution.