Journal articles Open Access Physico-chemical and Concentration of Heavy Metals Analyses in Virgin and Used Lubricating Oils: A Spectroscopy Study Kwasi Opoku Boadu · David Kofi Essumang · Benson Osa Evbuomwan · Ogbonna Friday Joel As a result of the changes that occur during their use, lubricating oils from automobiles tend to differ in terms of their physical and chemical composition from virgin and used lubricating oils. The analyses of the heavy metals distributi… RUF-38227 2019 CC BY 4.0 16 Apr 2020
