ASTM-VII

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Correct and good job.

ASTM D 4294 is an upgraded D 129 testing methodology for the determination of sulfur in lubriucating fluids.


D 4294 uses X-ray fluroescence to determine amount of sulfur and sulfur species.

D 129 uses a combusted (oxidized) sulfur with subsequent washing in a barium solution, which yields a barium sulfate which is then measured.
 
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