罗丹宁纤维富集-极谱法测定矿石和冶金样品中的钯

Determination of Trace Palladium in Ores and Metallurgy Samples by Polarography after Enrichment and Separation with Rhodanine Fiber

本文报道了罗丹宁纤维富集-极谱法测定矿石及冶金样品中Pd^4＋的方法。对影响Pd^4＋分离富集及极谱法测定的诸因素进行了研究，实验确定了最佳条件。方法测定Pd^4＋的线性范围为2．5～600μg·L^-1，检出限为0．5μg·L^-1；将该法用于矿石及冶金样品中Pd^4＋的分析测定，其结果与火试金法的测定结果吻合良好。本方法具有选择性好，灵敏度高，操作简便等特点，可用于Pd含量为0．02g·t^-1以上矿石和冶金样品中钯的测定。

A method based on rhodanine fiber preconcentration was developed for palladium analysis in ores and metallurgy samples by polarography. Factors affecting the separation/preconcentration have been investigated and the polarographic system has been optimized. Under the optimal condition, the analytical linear range of 2.5 μg·L^-1 to 600μg·L^-1 and detection limit of 0.5μg·L^-1 were obtained for Pd^4＋ determination. The analytical results for ores and metallurgy samples were in good agreement with that obtained by fire-assaying method. The proposed method with the advantages of good selectivity, high sensitivity and convenient operation can be used for the determination of Pd^4＋ above 0.02 got-1 in ores and metallurgy samples.