GB/T 15076.2-2019 Methods for chemical analysis of tantalum and niobium—Part 2:Determination of niobium content in tantalum—Inductively coupled plasma atomic emission spectrometry and stratography gravimetry
2019GB/T 15076.2-2019 Methods for chemical analysis of tantalum and niobium—Part 2:Determination of niobium content in tantalum—Inductively coupled plasma atomic emission spectrometry and stratography gravimetry
2008GB/T 15076.8-2008 Method for chemical analysis of tantalum and niobium.Determination of carbon and sulphur contents
1994GB/T 15076.12-1994 Methods for chemical analysis of tantalum and niobium-Determination of carbon content