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在10%盐酸溶液中(V/V),钯(Ⅱ)与碘化钾形成红色络离子(PdI_4~(2-)),在波长408和480nm处有两个吸收峰。用抗坏血酸消除碘的颜色及合金中其他元素的干扰。方法简便、准确,用以测定金基合金中0.5—6%的钯可获得良好结果。
Palladium (Ⅱ) forms red complex ion (PdI_4 ~ (2-)) with potassium iodide in 10% hydrochloric acid solution (V / V) and has two absorption peaks at 408 and 480 nm. Ascorbic acid to eliminate the color of iodine and other elements in the alloy interference. The method is simple and accurate, and good results are obtained for the determination of 0.5-6% palladium in gold-based alloys.