This presentation reports a comparison of a handheld Bruker Tracer III XRF and EPA Method 7471A for mercury (Hg) analysis of 51 South River bank soil samples. Calibration used 10 standards (1.07–587 ppm). Method detection limits were ~7.4 ppm (60 s) and ~3.4 ppm (100 s). Median recovery was 96% and mean RSD 23%. Moisture had minimal interference.
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No publication or presentation date is visible in the PDF. Slide content clearly shows 51 bank soil samples, calibration with 10 standards, use of a Bruker Tracer III handheld XRF, and comparison to EPA Method 7471A (Lancaster Labs referenced).
