微波消解—电感耦合等离子体原子发射光谱(ICP-AES)法测定锌精矿中银含量

DETERMINATION OF Ag CONTENT IN Zn CONCEN-TRATE BY MICROWAVE DIGESTION & ICP-AED

实验采用盐酸-硝酸微波消解样品,电感耦合等离子体发射光谱法(ICP-AES)测定锌精矿中的银含量,采用基体匹配的方式,消除基体干扰带来的测定误差。在仪器最佳工作条件下,方法的定量检出限为0.010 mg.L^(-1),测定范围5.0～500 g.t^(-1),RSD(n=6)为0.62%～3.50%,方法的加标回收率为96.0%～105.0%。该方法具有简便、快速、检出限低、准确高效的特点,用于锌精矿中银含量的测定,结果满意。

This experiment adopts hydrochloric acid-nitric acid dissolution samples, ICP-AES method to determine Ag content in Zn concentrate; adopts matrix matching way to eliminate error at measurement caused by matrix interference. In the best working conditions of instrument, the method for quantitative determination is limited to be 为2 0.010 mg.L-1, measurement range is 5.0-500 g.t-1,RSD （n= 6） 为 0.62%-3.50% ,the add mark recovery rate is between 96.0% and 105.0%. This method is characterized as simple and convenient, rapid, low detection limit, accurate and efficient. This results are satisfactory when used for the determination of Ag content in Zn concentrate.