钕铁合金是用于制备Nd-Fe-B永磁体的材料,在它的生产中需要测定铁和镨、钕,迄今尚未见有简便分析方法的报导。常规吸收光谱法测定镨、钕的灵敏度低、对低含量镨更难满足要求,笔者之一曾用稀土高氯酸溶液的三阶导数光谱法测定了镨钐钴合金及钇铝石榴石等 Neodymium iron alloy is used to prepare Nd-Fe-B permanent magnet material, in its production, the determination of iron and praseodymium, neodymium, so far no simple analysis methods have been reported. Conventional absorption spectrometry determination of praseodymium, neodymium low sensitivity, low content of praseodymium more difficult to meet the requirements, one of the authors have used rare earth perchloric acid solution of the third-order derivative spectroscopy plutonium samarium cobalt alloy and yttrium aluminum garnet