ASTM D4927 ASTM D4927
Calibration Standards for the elemental analysis of the additive elements barium, calcium, phosphorus, sulfur, and zinc in lubricating oils by WD-XRF. Conforms to ASTM D4927.
Calibration Standards for the elemental analysis of the additive elements barium, calcium, phosphorus, sulfur, and zinc in lubricating oils by WD-XRF. Conforms to ASTM D4927.