GSO ASTM D5185:2021
Gulf Standard
Current Edition
·
Approved on
01 July 2021
·
Standard Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
GSO ASTM D5185:2021 Files
English
9 Pages
Current Edition
Reference Language
GSO ASTM D5185:2021 Scope
1.1 This test method covers the determination of additive
elements, wear metals, and contaminants in used and unused
lubricating oils and base oils by inductively coupled plasma
atomic emission spectrometry (ICP-AES). The specific elements are listed in Table 1.
1.2 This test method covers the determination of selected
elements, listed in Table 1, in re-refined and virgin base oils.
1.3 For analysis of any element using wavelengths below
190 nm, a vacuum or inert-gas optical path is required. The
determination of sodium and potassium is not possible on some
instruments having a limited spectral range.
1.4 This test method uses oil-soluble metals for calibration
and does not purport to quantitatively determine insoluble
particulates. Analytical results are particle size dependent, and
low results are obtained for particles larger than a few
micrometers.2
1.5 Elements present at concentrations above the upper limit
of the calibration curves can be determined with additional,
appropriate dilutions and with no degradation of precision.
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