ASTM D 7343 - 12 Standard Practice for Optimization, Sample Handling, Calibration, and Validation of X-ray Fluorescence Spectrometry Methods for Elemental Analysis of Petroleum Products and Lubricants

This practice covers information relating to sampling,
calibration and validation of X-ray fluorescence instruments
for elemental analysis, including all kinds of wavelength
dispersive (WDXRF) and energy dispersive (EDXRF) tech-
niques. This practice includes sampling issues such as the
selection of storage vessels, transportation, and sub-sampling.
Treatment, assembly, and handling of technique-specific
sample holders and cups are also included. Technique-specific
requirements during analytical measurement and validation of
measurement for the determination of trace elements in
samples of petroleum and petroleum products are described.