Oxides Vs. Elemental Concentrations - Thermo Scientific NITON XL3t 500 User Manual

Oxides vs. elemental
concentrations
Thermo Scientific
Labs and other XRF instruments often report data as oxides. We can only
report data as elemental concentration. Therefore, oxide data must be
converted to elemental concentration for comparison with NITON results
using the conversion factors and equation below. This factor can be
multiplied by oxide concentration to convert to elemental.
Formula
Conc. (metal) = Conc. (oxide) * Mol.Wt. (metal)/Mol.Wt. (compound).
Table 1-1. Oxide Conversion
Oxire
MgO
Al2O3
SiO2
SO3
K2O
CaO
TiO2
V2O5
Cr2O3
Mn3O4
MnO
Fe2O3
FeO
Co3O4
NiO
CuO
ZnO
PbO
Fe2O3
Bi2O3
ZrO2
MoO3
WO3
Ta2O5
Nb2O5
SnO2

Oxides vs. elemental concentrations

Conveersion Factor
0.603
0.529
0.467
0.400
0.825
0.715
0.5995
0.5602
0.6842
0.7203
0.7745
0.6994
0.7773
0.7342
0.7858
0.7988
0.8034
0.9283
0.6994
0.8970
0.7403
0.6665
0.7930
0.8190
0.6990
0.7876
NITON XL3 Analyzer User's Guide 1-101