PPT Slide
Levels of detection (LOD) depends on several factors e.g. test time, particle size, homogeneity, bulk density, matrix, moisture and porosity.
Majority of elements LOD = 50g/t.
However, some elements have lower LOD (e.g. As, Pb, Mo, 10-20 g/t), some higher (e.g. Ni, Cr, Ta +100 g/t).
Ore LOD higher than soil, stream sediment (peak overlaps)
Limitations - Detection Limits