中文摘要：

用717阴离子交换树脂填充柱选择性吸附CdCl4^2-阴离子，以实现其与大量铜基体的分离。在标准溶液中匹配适当基体浓度并采用氢化物发生．原子荧光法，实现了铜／镉质量比为2000—50000的纯铜中痕量镉的测定。在基体铜的浓度为50mg／L的样品消化液中，镉的检出限为0．2μg/L；精密度为3．0％（n=7，3．0μg／L），镉浓度在1．0—25．0μg／L范围内呈良好线性关系。本法适用于纯铜中痕量镉的测定。

英文摘要：

An anion exchange-sequential injection-hydride generation-atomic fluorescence spectrometric procedure was developed for the determination of ultra-trace cadmium in pure copper forbidden by the Restriction of the use of Hazardous Substances in Electrical and Electronic Equipment （RollS）. A 50-mg/L copper concentration was employed in the standard solutions in order to match the copper matrix in the samples. In the presence of appropriate amount of hydrochloric acid, the copper matrix was effectively eliminated by selectively absorbing the CdCl4^2- complex onto a 717 anion exchanger packed mini-column. The present procedure could be used for the determination of cadmium in pure copper with a Cu/Cd mass ratio in the range of 2000 - 50000. A detection limit of 0.2μg/L was achieved within a linear range of 1.0 - 25.0μg/L, along with a RSD value of 3.0% （at 3.0μg/L, n =7 ）. The procedure was applied for the determination of cadmium in a pure copper sample, and spiking recoveries were also performed.