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ASTM D 2622 Document Information:
Title
Standard Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry
ASTM International
Publication Date:
Mar 1, 2008
Scope:
This test method covers the determination of total sulfur in
petroleum and petroleum products that are single-phase and either
liquid at ambient conditions, liquefiable with moderate heat, or
soluble in hydrocarbon solvents. These materials can include diesel
fuel, jet fuel, kerosene, other distillate oil, naphtha, residual
oil, lubricating base oil, hydraulic oil, crude oil, unleaded
gasoline, gasohol and biodiesel.
The range of this test method is between the PLOQ value
(calculated by procedures consistent with Practice D 6259) of 3
mg/kg total sulfur and the highest level sample in the round robin,
4.6 wt. % total sulfur.
NOTE 1—Instrumentation covered by this test method can vary in
sensitivity. The applicability of the test method at sulfur
concentrations below 3 mg/kg may be determined on an individual
basis for WDXRF instruments capable of measuring lower levels, but
precision in this test method does not apply.
The values of the limit of quantitation (LOQ) and method
precision for a specific laboratory's instrument depends on
instrument source power (low or high power), sample type, and the
practices established by the laboratory to perform the method.
Samples containing more than 4.6 mass % sulfur should be diluted
to bring the sulfur concentration of the diluted material within
the scope of this test method. Samples that are diluted can have
higher errors than indicated in Section 14 than non-diluted
samples.
Volatile samples (such as high vapor pressure gasolines or light
hydrocarbons) may not meet the stated precision because of
selective loss of light materials during the analysis.
A fundamental assumption in this test method is that the
standard and sample matrices are well matched, or that the matrix
differences are accounted for (see 12.2). Matrix mismatch can be
caused by C/H ratio differences between samples and standards or by
the presence of other interfering heteroatoms or species (see Table
1).
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.
*A Summary of Changes section appears at the end of this
standard.
Keywords:
- analysis
- diesel
- gasoline
- jet fuel
- kerosene
- petroleum
- spectrometry
- sulfur
- wavelength dispersive x-ray fluorescence
- X-ray
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