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)

Lubricants, industrial oils and related products
Including mineral oils, fluids for metal working and for temporary protection against corrosion
Physicochemical methods of analysis
Including spectrophotometric and chromatographic analysis

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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