Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
The Indirect Determination of Mercury in an Aqueous Solution using the Ligand Exchange Reaction
Itsuro KawaiTadashi Hara
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1969 Volume 42 Issue 12 Pages 3466-3470


A new method for the indirect determination of mercury in an aqueous solution has been established on the basis of the fact that the absorption and evolution of propylene in the reaction between mercuric ion and propylene take place reversibly and quantitatively under proper conditions. In the method proposed, the propylene in the 1 : 1 π-complex is displaced with such complexing agents as chloride, bromide, iodide and EDTA, and the quantity of the propylene evolved is measured manometrically. By the present method, up to 70 mg Hg can be estimated within ±0.08 mg in about 15 min. Common cations and anions do not interfere. Though silver(I) and palladium ions interfere, their interferences are removed by suitable procedures. By improving the apparatus, it should be possible to estimate much smaller amounts of mercury than the above value.

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