Determination of additive elements
in lubricating oils by inductively coupled
plasma atomic emission spectrometry -
Test method
(First revision)
1.1 This test method covers the quantitative determination
of barium, boron, calcium, copper, magnesium, molybdenum,
phosphorus, sulfur, and zinc in unused lubricating oils and
additive packages.
1.2 The precision statements are valid for dilutions in which
the mass % sample in solvent is held constant in the range of
1 to 5 mass % oil.
1.3 The precision tables define the concentration ranges
covered in the interlaboratory study. However, both lower and
higher concentrations can be determined by this test method.
The low concentration limits are dependent on the sensitivity
of the ICP instrument and the dilution factor. The high
concentration limits are determined by the product of the
maximum concentration defined by the linear calibration curve
and the sample dilution factor.
1.4 Sulfur can be determined if the instrument can operate at
a wavelength of 180 nm.
1.5 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
standard.
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 prior to use.
