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Document Designation and Title Year Select Item(s) D4628 Standard Test Method for Analysis of Barium, Calcium, Magnesium, and Zinc In Unused Lubricating Oils By Atomic Absorption Spectrometry 05 D4628 Standard Test Method for Analysis of Barium, Calcium, Magnesium, and Zinc In Unused Lubricating Oils By Atomic Absorption Spectrometry 02 D4628 Standard Test Method for Analysis of Barium, Calcium, Magnesium, and Zinc In Unused Lubricating Oils By Atomic Absorption Spectrometry 97