Trace elements in aqueous solutions by UltraCarry® method AppNote XRF1085: trace elements in aqueous solutions by UltraCarry
Sulfur in crude oil and fuels per ASTM D2622-16 AppNote XRF1082: sulfur in crude oil and fuels per ASTM D2622-16
Lubricating Oil Analysis by WDXRF According to ASTM D6443-14 AppNote XRF1105: Lubricating Oil Analysis by WDXRF According to ASTM D6443-14