ARCHIVES
VOL. 10, ISSUE 2 (2026)
Comparative analysis of metal contents in fresh and used lubricating oils
Authors
Yanda Mohammed Kudu, Ehirim Appolinus I, Ekpewu-Ovie, Raina A, Nwosu, Maduabuchi Joseph, Echenu, Favour A
Abstract
The study compared the analysis of wear metals
in fresh and used lubricating oils. Four samples of fresh lubricating oils were
categorized as A1, B1, C1 and D1
while their used oil counterparts were designated as A2, B2,
C2 and D2 respectively. A dry ash method was adopted for
digestion of the samples in a 10:1 (oil: acid) ratio (W/V). The digested sample
solutions were subjected to Atomic absorption spectroscopy (AAS) for the
detection and quantification of six wear metals. The wear metal concentrations
determined for fresh oil were in the range 508-1097.5, 172.1-3557, 574.45-1009.90,
2.5-3.95, 3.15-16.45, 3.05-10.45 ppm for Ca, Mg, Zn, Fe, Cr and Ni respectively,
their corresponding oil metal concentrations were in the range of 570.05-934.25,
110.55-400.55, 761.15-1004.39, 2.10-5.50, 2.40-34.55 and 5.40-303.40 ppm
respectively for the same metal ions. Among the investigated metal ions of A2,
Cr made up 1.54%. The information about these metal concentrations will be
helpful in monitoring and maintaining generators and machine engines while also
indicating which metals could be quantitatively recovered and thereby being
used to solve environmental problems.
Pages:4-8
How to cite this article:
Yanda Mohammed Kudu, Ehirim Appolinus I, Ekpewu-Ovie, Raina A, Nwosu, Maduabuchi Joseph, Echenu, Favour A "Comparative analysis of metal contents in fresh and used lubricating oils". International Journal of Chemistry Studies, Vol 10, Issue 2, 2026, Pages 4-8
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