A Catalytic Spectrophotometric Method for the Analytical Determination of Trace Amounts of Mercury (II)
نویسندگان
چکیده
A catalytic method has been developed for the determination of microgram amounts of mercury (II) based on its catalytic effect on the rate of a ligand substitution reaction. The reaction studied involved the substitution of cyanide in hexacyanoferrate (II) by resacetophenone benzoic acid hydrazone (2’, 4’dihydroxy propiophenone benzoic acid hydrazone) and the reaction was monitored spectrophotometrically. Satisfactory results were obtained for the determination of mercury (II) in the range 0.1086-0.9774 μg/ml. The relative standard deviation was less than 2.1%. The method detection limit and limit of quantification was found to be 0.041 μg/ml and 0.083 μg/ml respectively (n=7). The correlation coefficient for the determination was found to be 0.9989. The effect of foreign ions on the determination was studied.
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