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目前,对含大量铜、镍、铁物料中微量金、钯的测定方法很多,如分光光度法、极谱法、原子吸收法等。但由于上述元素有不同程度的干扰,均需预先分离。其分离方法至今大多仍采用活性碳或泡沫塑料吸附法、共沉淀法、离子交换法、火试金法等。这些方法不足之处在于手续繁琐、费时,有的方法选择性不高。二异戊基硫醚(S-201)对金、钯都具有良好的选择性,国外已将S-201同类型的萃取剂用于贵金属的生产和分析中,国内对这类萃取剂也进行了研究,初步获得应用。
At present, there are many methods for the determination of trace amounts of gold and palladium in large amounts of copper, nickel and iron materials, such as spectrophotometry, polarography, and atomic absorption spectrometry. However, due to the above elements have different levels of interference, are required to be separated in advance. Most of its separation methods still use activated carbon or foam adsorption, coprecipitation, ion exchange, fire test method. The inadequacies of these methods lie in the cumbersome and time-consuming procedures and the low selectivity of some methods. Diisopentyl sulfide (S-201) of gold, palladium has a good selectivity, foreign S-201 has been the same type of extractant used in the production and analysis of precious metals, such extractants are also carried out in China Study, preliminary application.