GB/T 12690.14-1990
稀土金屬及其氧化物化學分析方法 發射光譜法測定氧化鑭、氧化鈰、氧化釹、氧化釓中鈷、鐵、錳、鉛、鉻、鎳、銅、鋅的氧化物量
Lanthanum oxide, cerium oxide, neodymium oxide, gadolinium oxide--Determination of cobalt, iron,manganese, nichel, copper, ckromium, lead and zinc in oxides contents--Emission spectrographic method
GBT12690.14-1990, GB12690.14-1990