EDXRF APPLICATION NOTE ANALYSIS OF LUBE OILS #1312 Applied Rigaku Technologies, Inc. 9825 Spectrum Drive, Bldg. 4, Suite 475 Austin, TX 78717 USA www.RigakuEDXRF.com info@RigakuEDXRF.com (+1) 512-225-1796 SCOPE The measurement of P, S, Ca and Zn in lube oil is demonstrated as per ASTM D6481. BACKGROUND ASTM D6481 is a standard test method for measuring lube oil using EDXRF. The elements and concentration ranges covered by D6481 are specified in Table 1 of the method. Element Range Phosphorus 0.02 to 0.3 mass % Sulfur 0.05 to 1.0 mass % Calcium 0.02 to 1.0 mass % Zinc 0.01 to 0.3 mass % ASTM D6481-99(2010) Table 1 Elements and Range of Concentrations Determined Quality control and quality assurance during the lube oil manufacturing process is essential, as various formulations for give different lubricity properties. A fast, simple method of analyzing lube oils is important throughout the QC/QA process. Rigaku meets this industry need with a high performance low cost benchtop EDXRF system. Rugged and reliable, the NEX QC+ is an ideal tool, with simple and intuitive software for the non-technical operator. INSTRUMENTATION Model: Rigaku NEX QC+ X-ray tube: 4 W Ag-anode Detector: SDD Sample Type: Lube Oil Film: 4 um Prolene (3.5um Mylar is also acceptable) Environment: Helium Analysis Time: 300 seconds Window Ring: Single Position Optional: 6 Position Sample Tray SAMPLE PREPARATION Ensure each sample is homogeneous and stable. Simply fill a 32mm XRF sample cup ¾ full (5g) of sample.
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