In what units are XRF measurements reported?

XRF measurements are reported in milligrams per square centimeter (mg/cm²) because this unit reflects the concentration of lead on the surface of a material. The X-ray fluorescence (XRF) method is primarily used for detecting and quantifying heavy metals, including lead, on surfaces, such as paint or soil. The broader context involves assessing the risk associated with lead exposure, and this measurement is crucial in determining whether surfaces exceed acceptable lead levels.

The unit mg/cm² specifically indicates how much lead is present per unit area, which is essential for evaluating compliance with health regulations and making decisions about remediation. By using a surface area measurement rather than a volume or mass measurement alone, professionals can more accurately gauge the potential for lead exposure in a given environment.