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测定钇组稀土的方法,一般是测定稀土总量和铈组稀土分量,然后用差量法求出钇组稀土分量。应用多元络合物测定钇组稀土,具有很高的灵敏度,但络合物体系较为复杂,由于高含量干扰离子的影响,应用受到局限性。为此,我们研究了用5-Br-PADAP[2-(5-溴÷2-吡啶偶氮)-5-二乙基氨基酚]分光光度测定钇组稀土,并已成功地用于测定钇基重稀土球墨铸铁、合金钢和矿石中的微量钇组稀土。本法具有准确、简便、快速等优点。
Determination of rare earth yttrium group method is generally determined by the total rare earth and cerium rare earth components, and then calculated by the difference yttrium rare earth components. The application of multiple complexes to the determination of rare earth yttrium group, with high sensitivity, but the complex system is more complex, due to the impact of high levels of interfering ions, the application is limited. To this end, we investigated the spectrophotometric determination of yttrium group rare earths using 5-Br-PADAP [2- (5-bromo ÷ 2-pyridylazo) -5-diethylaminophenol] and have been successfully used to determine yttrium Base heavy rare earth ductile iron, alloy steel and ores of trace amounts of yttrium group of rare earths. This law is accurate, easy, fast and so on.