【摘要】 研究了在稀硫酸溶液中,在Ag⁺的存在下,K₄Fe（CN）₆和o-Phen的反应（银的新指示反应）,反应机理为并用此来测定痕量银。根据Arrhenius方程式计算了催化和非催化反应的活化能,分别为64.15KJ/mol和96.89KJ/mol。本方法灵敏度为8×10^-12g·ml^-1,且选择性好。测定地质样品结果满意。平均标准偏差为0.024,变动系数2.43％。更多还原

【Abstract】 A new indicator reaction catalyzed by silver has been studied. When silver is present K4Fe(CN)8 reacts with o-phenanthroline in the solution of dilute H2SO4, the mechanism may be represented as follow:and trace silver could be estimated with the reaction.The apparent activation energies of catalytic and uncatalytic reaction are 64.15 and 96.89 kJ·mol-1, respectively, was calculated by Arrhenius Formula.Compared with other methods, this one is higher sensilivity and selectivity. The sensitivity is 8×10-1g·ml-1.The method has been used for the determination of silver in geological samples with satisfactory results .The average standard deviation of determination is 0.024 and the average coefficient variation 2.43%.更多还原