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以亚硝基R盐作为螯合剂制备了负载树脂,研究了用该树脂分离富集Au(Ⅲ)、Pt(Ⅳ)和Pd(Ⅱ)的最佳条件。当pH为2.0时,溶液中Au(Ⅲ)、Pt(Ⅳ)和Pd(Ⅱ)的氯络阴离子被吸附富集在树脂上,吸附率94%～96%,而大部分常见的贱金属离子在上负载树脂柱前上阳离子交换柱得以分离。用0.1mol/LHCl-30g/L硫脲溶液以0.5mL/min的流速对被吸附的Au(Ⅲ)、Pt(Ⅳ)和Pd(Ⅱ)进行洗脱,洗脱率96%,最后用原子吸收光谱法进行测定。方法经标样分析验证,结果与标准值相符,对含量为10-6水平的Au(Ⅲ)、Pt(Ⅳ)和Pd(Ⅱ),6次测定的RSD分别为5.2%、8.4%和6.9%。
The supported resin was prepared by using nitroso R salt as chelating agent. The optimum conditions for the separation and enrichment of Au (Ⅲ), Pt (Ⅳ) and Pd (Ⅱ) with this resin were studied. When the pH is 2.0, the chloride anions of Au (Ⅲ), Pt (Ⅳ) and Pd (Ⅱ) are adsorbed and enriched on the resin with the adsorption ratio of 94% ~ 96%, while the most common base metal ions The cation exchange column is separated before loading the resin column. The adsorbed Au (Ⅲ), Pt (Ⅳ) and Pd (Ⅱ) were eluted with 0.1mol / LHCl-30g / L thiourea solution at a flow rate of 0.5mL / min. The elution rate was 96% Absorption spectrometry. The results were in good agreement with the standard values. The RSDs of Au (Ⅲ), Pt (Ⅳ) and Pd (Ⅱ) with 10-6 levels were 5.2%, 8.4% and 6.9 %.