论文部分内容阅读
钐钴或镨钐钴磁性材料已得到了广泛应用,然而对其中镨或钐的测定,除了需用昂贵仪器的X—荧光光谱法外,至今尚缺简便而快速的分析方法,已报导的化学分析方法有离子交换法分离、或萃取色谱法分离容量法测定及铜试剂—氯仿萃取分离、DTPA分光光度法测定,以上方法均采用各种分离步骤,达不到简便、快速的目的.导数分光光度法具有分辨重叠峰的功能,既可使稀土离子的特征峰的选择性提高,且在高阶导数的求导过程中常使具有宽吸收谱带的干扰逐渐降低乃至完全消失.为此可大大提高稀土元素测定的选择性.本文在前报的基础上研究了镨和钐的高氯酸溶液的三阶导数吸收光谱及大量钴对镨和钐导数峰高的影响,并且探讨了如何提高导数分光光度法的测量精密度的问题,提出了直接快速测定镨—钐—钴合金中镨和钐的导数分光光度法,并获得了较好的结果.
Samarium cobalt or praseodymium samarium cobalt magnetic material has been widely used, but for the determination of praseodymium or samarium, in addition to the need for expensive instruments X-fluorescence spectroscopy, there is still no easy and fast analytical methods, the reported chemistry Analytical methods are ion-exchange method, or separation of the extraction capacity of chromatography and copper reagent - chloroform extraction and separation, DTPA spectrophotometric determination of the above methods are used in a variety of separation steps, not as easy, fast purpose. Derivative spectroscopy The photometric method has the function of distinguishing overlapping peaks, which can not only improve the selectivity of rare earth ions but also reduce or even eliminate the interference with wide absorption band in the derivation process of higher order derivatives. Improve the selectivity of rare earth element determination.In this paper, based on the previous report of praseodymium and samarium perchloric acid solution of the third derivative absorption spectra and a large number of cobalt on praseodymium and samarium derivative peak height, and discussed how to improve the derivative Spectrophotometry measurement precision, the direct and rapid determination of praseodymium - samarium - cobalt alloy praseodymium and samarium derivative spectrophotometry, and obtained good results.