The effect of trace levels of cyanide on the formation of mercury-iodide complexes.
The interference of trace levels of cyanide with the formation of iodo-mercury complexes is made the basis of a method of trace analysis for cyanide. The decrease in absorbance of the iodo-mercury complexes is a linear function of total cyanide concentration up to about 5 x 10(-5)M in 0.1M sodium hydroxide medium when the iodide and mercury total concentrations are 0.05 M and 3 x 10(-5)M respectively. Several cyano-mercury complexes are formed simultaneously, and quite a large fraction of the cyanide remains uncomplexed.
Umeh
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EO
Chemistry Department, University of Ibadan, Ibadan, Nigeria.
Fadiya
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OO