| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 0.59 | AA |
1988.01 | Personal communication, BMG, Philippines | | | | E.M.Macalalad |
| <0.34 | INAA |
1989.03 | Personal communication, Musashi Institute of Technology, Japan | | | | S.Hirai and S.Suzuki |
| 0.4 | 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 |
| 1.35 | ICPES |
1993.06 | Personal Communication, Continental Lime Inc., USA | | | | S.Berman |
| 0.27 | AA |
1996 | Determination of molybdenum in fifty three geochemical reference materials by flameless atomic absorption spectrometry | Geostamdards Newsletter | 21 | 93-96 | S.Terashima |
| <0.8 | ICPES |
1998 | Personal communication,Association of cement,Tokyo,Japan | | | | H.Anzai |