Which testing method can confirm the presence of lead in paint?

X-ray fluorescence (XRF) testing is a highly effective method for confirming the presence of lead in paint. This non-destructive technique allows for the immediate analysis of lead content without the need for taking physical samples or altering the surface of the painted material. XRF works by directing x-rays at the paint surface, which then emits characteristic fluorescent x-rays if lead is present. The intensity of these fluorescent x-rays is measured and compared against known standards to determine the concentration of lead.

While other methods listed do have their applications, they do not specifically confirm lead presence in the same effective manner. Laboratory analysis of paint samples can provide accurate results, but it requires a more involved process where samples must be collected and sent to a lab for analysis, leading to delays. Visual inspection for peeling paint can suggest potential lead issues but does not provide definitive confirmation about the lead content. Surface wipe collection can test for lead dust but not directly measure lead in the paint layer itself. Thus, XRF is the preferred method for immediate and reliable identification of lead in paint.