Analytical Sciences

Abstract − Analytical Sciences, 21(11), 1365 (2005).

Determination of Wear Metals in Lubrication Oils: A Comparison Study of ICP-OES and FAAS
Pekka VÄHÄOJA,* Ilkka VÄLIMÄKI,** Katri HEINO,*** Paavo PERÄMÄKI,* and Toivo KUOKKANEN*
*University of Oulu, Department of Chemistry, P.O. Box 3000, FIN-90014 Oulu, Finland
**Suomen Ympäristöpalvelu Oy, Kiilakiventie 1, FIN-90250 Oulu, Finland
***Oulu Polytechnic, Institute of Technology, Kotkantie 1, FIN-90250 Oulu, Finland
Certain wear metals (Fe, Cr, Ni, Cu and Zn) of various lubrication oils were determined by means of ICP-OES and FAAS. The kerosene dilution method, which is used widely together with ICP-OES, was applied with both methods here. Calibration standards were made from a commercial organo-metallic standard. Our aim was to clarify the possibility of using the quick kerosene dilution method together with FAAS for a rapid check for certain indicator metals. Metal determinations with FAAS were accurate enough for quantitative work in machine condition diagnostics and waste oil characterization, when compared with those with ICP-OES.