1. Rudolf Bock,A Handbook of Decomposition Methods in Analytical Chemistry, International Textbook Co. 1979, 73.
2. Ye Shuzhen,Proceedings of National Symposium on Chemical Analyses of Rocks and Minerals, Geological Publishing House, Beijing, 1982, 456.
3. Cao Xixiong,Proceedings of National Symposium on Chemical Analyses of Rocks and Minerals, Geological Publishing House, Beijing, 1982, 453.
4. Ken Matsumotoet al., Anal. Chem., 31, 3 (1982), 143 (in Japanese).
5. Nicolas, D.J.Anal. Chim. Acta, 55 (1971), 59.