Lubricating oils: analysis according to ASTM D6443 and D4927

Turnkey solution for analysis of additives in lubricating oils

Almost all commercial oils contain chemical additives to enhance their performance for a particular application. The ASTM D6443 and ASTM D4927 international standard test methods are used to determine if the oils, additives, and additive packages meet specification. These methods employ wavelength dispersive X-ray spectroscopy (WD XRF) and mathematical matrix corrections procedures. XRF is an excellent method for multi-elemental analysis as it provides cost-effective, precise and accurate data and fast data acquisition. Individual calibrations can be used for months, avoiding time-consuming and costly recalibration. Especially for liquids, the sample preparation is simple and the analysis does not require highly skilled lab personnel.

Expertise Program for XRF analysis of additives in lubricating oil according to ASTM D6443 and D4927

This Expertise program delivers a complete methodology to establish norm compliance and covers all aspects from sample preparation to quality assurance. Customers can choose to request a quote for either one or both norms to be covered in the program. The following elements and concentration ranges are covered:

D4927   D6443
Elements ppm   Elements ppm
Ba 0 - 0.04 Ca 0 - 0.4
Mg 0 - 0.08 Mg 0 - 0.2
P 0 - 0.25 P 0 - 0.25
S 0 - 2.5 S 0 - 1.0
Si 0 - 0.18 Cl 0 - 0.2
Cl 0 - 0.2 Zn 0 - 0.25
Ca 0 - 0.5 Cu 0 - 0.4
Mo 0 - 0.05
Zn 0 - 0.25


  • Suit of calibration standards for D4927 and/or D6443 including validation sample
  • P-1 or P-2 cups and assembly tool and pre-cut Mylar foils, sufficient for calibration and validation
  • Setup of optimized application setup and calibration for accurate analysis of the range of elements in concentration ranges as given in the table above
  • Setup of methodology validation and calibration maintenance procedure
  • Advice on sample preparation best practices and workflow optimization
  • User training and documentation


  • Statistical Process Control  for setting up QA/QC workflows*
  • Software: Oil-Trace, which corrects for variations in the oxygen to hydrocarbon ratio of samples, allowing best accuracy and use of a single calibration for multiple matrices


  • Malvern Panalytical XRF spectrometer: ZetiumAxios or MagiX (Pro) sequential spectrometers, equipped to run liquids

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SPC is already included with Zetium systems