GB/T 13747.25-2017
ActiveMethods for chemical analysis of zirconium and zirconium alloys—Part 25：Determination of niobium content—2-(5-bromo-2-pyridylazo)-5-diethylam inophenol spectrophotometry and inductively coupled plasma atomic emission spectrometry
锆及锆合金化学分析方法 第25部分：铌量的测定 5-Br-PADAP分光光度法和电感耦合等离子体原子发射光谱法
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