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ASTM D 4628 Document Information:
Title
Standard Test Method for Analysis of Barium, Calcium, Magnesium, and Zinc in Unused Lubricating Oils by Atomic Absorption Spectrometry
ASTM International
Publication Date:
Nov 1, 2005
Scope:
(Footnote *)
This test method is applicable for the determination of mass percent
barium from 0.005 to 1.0 %,
calcium and magnesium from 0.002 to 0.3 %, and zinc from 0.002 to 0.2
% in lubricating oils.
Higher concentrations can be determined by appropriate dilution. Lower
concentrations of metals
such as barium, calcium, magnesium, and zinc at about 10 ppm level can
also be determined by this
test method. Use of this test method for the determination at these
lower concentrations should be
by agreement between the buyer and the seller.
Lubricating oils that contain viscosity index improvers may give low
results when calibrations are
performed using standards that do not contain viscosity index
improvers.
The values stated in SI units are to be regarded as the standard. The
values given in parentheses
are for information only.
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 prior to use. Specific
warning statements are given in 3.1, 6.3, and 8.1.
Footnote * - A Summary of Changes section appears at the end of this
standard.
Keywords:
- additive elements
- atomic absorption spectrometry
- barium
- calcium
- lubricating oils
- magnesium
- zinc
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