| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 0.66 | INAA |
1989.03 | Personal communication, Musashi Institute of Technology, Japan | | | | S.Hirai and S.Suzuki |
| 0.53 | ICPMS |
1991 | Rare earth elements in the standard sample of lake deposits(abst) | 40th Annual Meeting Japan,Soc.Anal,Chem | | 291 | K.Iwasaki |
| 0.51 | ICPMS |
1993.04 | Simultaneous determination of thirty-seven trace elements in twenty-eight international rock standards by ICP-MS | Geost. Newsletter | 17 | 81-97 | CD.Garbe-Schonberg |
| 0.425 | ICPES |
1993.09 | Personal Communication, Cesky Geologicky Ustav | | | | I.Rubeska |
| 0.63 | ICPMS |
1994 | Personal Communication,WSU GeoAnalytical Laboratory, USA | | | | C. Knaack, S. Cornelius and P. Hooper |
| 0.63 | ICPMS |
2000 | Personarl Communication,Washington State University | | | | D. Johnson |