Trace elements
Solids and solutions
Geologic, Biologic and Engineered
Solution samples should in a 2%HNO3 matrix with sample analytes in the 1-100 ppb range for most element. Sample must have less than 2% TDS and no particulate matter.
Solid sample can be prepared as described in the mapping page.
ESEM image of 50um laser spots in a NIST glass