YS/T 254.4-1994 Methods for chemical analysis of beryllium concentrates-beryl The atomic absorption spectrophotometric method for determination of lithium oxide content (English Version)
2011YS/T 254.4-2011 Methods for chemical analysis of beryllium concentrate and beryl.Part 4:Determination of lithium oxide contents.Flame atomic absorption spectrometry
1970YS/T 254.4-1994 Methods for chemical analysis of beryllium concentrates-beryl The atomic absorption spectrophotometric method for determination of lithium oxide content