GB/T 18115.4-2006 in English

《GB/T 18115.4-2006稀土金属及其氧化物中稀土杂质化学分析方法 钕中镧、铈、镨、钐、铕、钆、铽、镝、钬、铒、铥、镱、镥和钇量的测定》由TC229（全国稀土标准化技术委员会）归口，主管部门为国家发展和改革委员会。
本方法规定了氧化钕中氧化镧，铈，镨等含量的测定。本方法适用于氧化镧，铈，镨等含量的测定。本方法也适用金属钕中镧，铈，镨等含量的测定。

Scope

This method specifies the content of lanthanum oxide, cerium oxide, praseodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, lutetium oxide and yttrium oxide in neodymium oxide. test methods. This method is suitable for determining the content of lanthanum oxide, cerium oxide, praseodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, lutetium oxide and yttrium oxide in neodymium oxide. Determination. The measurement range is shown in Table 1. This method is also applicable to the determination of lanthanum, cerium, praseodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium content in metallic neodymium.