1. Scope
1.1 This test method covers the quantitative determination of additive elements in unused lubricating oils and additive packages as shown in Table 1. The pooled limit of quantitation of this test method as obtained by statistical analysis of interlaboratory test results is 0.02 % for magnesium, 0.003 % for phosphorus, 0.002 % for sulfur, 0.001 % for chlorine, 0.003 % for calcium, 0.001 % for zinc, and 0.002 % for molybdenum. 1.2 Additive packages require dilution with a contamination free diluent (base oil) before analysis. The dilution factor has to be calculated from the expected concentrations to bring the concentrations for all elements into the ranges listed in Table 1. 1.3 Some lubrication oils will contain higher concentrations than the maximum concentrations listed in Table 1. These samples require dilution with a contamination-free diluent (base oil) before analysis. The dilution factor has to be calculated from the expected concentrations to bring the concentrations for all elements into the ranges listed in Table 1. 1.4 This test method is limited to the use of energy dispersive X-ray fluorescence (EDXRF) spectrometers using an X-ray tube for excitation in conjunction with the ability to separate the signals of adjacent elements by using a high-resolution semiconductor detector. 1.5 This test method uses inter-element correction factors calculated from a fundamental parameters (FP) approach or another matrix correction method. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations to use.
Keywords
additive elements; additives; lubricating oil; spectrometry; X-ray; energy dispersive; EDXRF; XRF; magnesium; silicon, phosphorus; sulfur; chlorine; calcium; zinc; molybdenum; barium
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
[Back to Top]
