I want to do elemental analysis of the Mesozoic shales and siltstones and wanted to standardize the XRF instrument, could any one suggest from where i can purchase rock standards?
A quick web search showed up the following entries. You could try European Commission reference materials: https://ec.europa.eu/jrc/en/reference-materials
and the LGC catalogue: http://www.lgcstandards.com/AU/en/CATALOGUE-FINE-cat-USA/Rocks-ceramic-materials-and-minerals/c/H-655
Direct International shopping trough Websites sometimes is difficult due to the Custom's Regulations and related administrative bureaucracy.
Good standards for calibration of basalt rocks can be obtained from: USGS (USA), Mintek(SouthAfrica), NCS (China), CCRMP (Canada) and GSJ (Japan). Check the number of certified elements for each standard.
You can get a certified reference material (basalt - BRP-1) from the Brazilian geological Survey ( [email protected] ). They will charge, only, for the mail service.
BRP-1 Certificate (major, minor and 44 trace elements) is attached. I'm also including Link for papers were BRP-1 was analysed.
I am from Egypt and after about 30 years experience in geochemical analyses I found that the best standards are the Japanese standards and can you use the following web: