ASTM D 7214 REV A Standard Test Method for Determination of the Oxidation of Used Lubricants by FT-IR Using Peak Area Increase Calculation
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ASTM D 7214 REV A Document Information:
Title
Standard Test Method for Determination of the Oxidation of Used Lubricants by FT-IR Using Peak Area Increase Calculation
ASTM International
Publication Date:
Dec 1, 2007
Scope:
This test method covers the determination of the oxidation of
used lubricants by FT-IR (Fourier Transform Infrared Spectroscopy).
It measures the concentration change of constituents containing a
carbonyl function that have formed during the oxidation of the
lubricant.
This test method may be used to indicate relative changes that
occur in an oil under oxidizing conditions. The test method is not
intended to measure an absolute oxidation property that can be used
to predict performance of an oil in service.
This test method was developed for transmission oils which have
been degraded either in service, or in a laboratory test, for
example a bulk oxidation test. It may be used for other in-service
oils, but the stated precision may not apply.
The results of this test method may be affected by the presence
of other components with an absorbance band in the zone of
1600–1800 cm-1. Low PAI values may be difficult to
determine in those cases. Section 6 describes these possible
interferences in more detail.
The values stated in SI units are to be regarded as standard. No
other units of measurement are included in this standard.
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.
*A Summary of Changes section appears at the end of this
standard.
Keywords:
- differential spectrum
- FT-IR
- in-service lubricant
- lubricant
- oxidation measurement
- PAI
- used oil
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