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提出了一个高灵敏分光光度测定铱的方法.实验表明,加热时,铱与氯化亚锡可形成络阴离子.在最佳条件下,此络阴离子与结晶紫阳离子生成离子缔合物.聚乙烯醇存在下,可在水溶液中测定铱.在波长540nm处,缔合物溶液的摩尔吸光系数等于1.25×10~6l·mol~(-1)·cm~(-1).铱含量在0～4μg/25ml范围符合比尔定律.金和其它铂族金属干扰铱的测定,测定前必须将其分离.
A highly sensitive spectrophotometric method for the determination of iridium was proposed.The experiments show that when heated, iridium and stannous chloride can form complex anions.At the optimum conditions, the complex anions and ionic ions ion ion association.Polyethylene Iridium can be measured in aqueous solution in the presence of alcohol.The molar absorption coefficient of the complex solution is equal to 1.25 × 10 ~ 6l · mol -1 (cm -1) at the wavelength of 540nm.The content of iridium is between 0 ~ The range of 4 μg / 25 ml complies with Beer’s Law, and the determination of gold and other platinum group metals that interfere with iridium must be separated before the measurement.