What was a common issue with older XRF models regarding classification?

The common issue with older XRF (X-ray fluorescence) models primarily revolved around producing inconclusive results. This issue arose from various factors, including limitations in technology and calibration methods. Older models often struggled to provide clear determinations on lead content, particularly when dealing with complex matrices or varying surface conditions of materials. Consequently, results could indicate that lead was present or absent without offering certainty, complicating the assessment processes for risk assessors.

Addressing concerns about the effectiveness of risk assessments, it was critical for assessors to have reliable data, as the lack of definitive conclusions could lead to misinformed decisions regarding lead hazards. This made the interpretation of data from older XRF models a challenge, as the potential for misidentifying safe or hazardous conditions posed health risks to inhabitants in environments where lead exposure was a concern.