The ASTM E 2119-20 standard provides a quality control procedure for the measurement of lead content in Coatings or Miscellaneous coatings using a portable X-Rays Fluorescence (XRF) device on site. The standard focuses on the collection and recording of quality control measurements to ensure that instrument performance meets the standard requirements when using XRF equipment in the field. The standard emphasizes the importance of calibrate inspections and data recording and requires that equipment manufacturer's operating instructions be followed. This standard is not intended to judge the hazards of Coatings, but provides a framework and operating guidelines for quality control.