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* Lubricating Oil Analysis by Benchtop WDXRF According to ASTM D6443-04

From Rigaku Corporation

Lubricating oils are given specific functional properties
by mixing additives with base oil. In order to assure
consistent and desirable performance, it is very im
portant to control the concentrations of the additives
during the lubricant manufacturing process.
X-ray fluorescence (XRF) spectrometry has become
increasingly popular for quantitative elemental analysis
of base oils as well as additives and lubricant products
thanks to its high precision and simple sample
preparation. With liquids, sample preparation for XRF
typically means pouring the sample into a plastic cup
equipped with a transparent film. Unlike traditional
techniques, such as Inductively-Coupled Plasma
Optical Emission Spectroscopy (ICP-OES), XRF does
not require chemical decomposition, digestion or serial
dilution. ASTM D6443-04 specifies the use of the
wavelength-dispersive (WD) XRF technique, because
it offers sufficiently high precision, resolution and
light-element sensitivity to meet the industry's needs.

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