Bismuth-Remaining Cupellation Fire Assay Preconcentration Combined with Inductively Coupled Plasma Mass Spectrometry for the Simultaneous Determination of Ultratrace Au, Pt, Pd, Ru, Rh, and Ir in Geologic Samples

Figure 1

Magnesium ash dish cooling method. (a) Full immersion before cooling, (b) full immersion after cooling, (c) semi-immersion before cooling, and (d) semi-immersion after cooling.

(a)

(b)

(c)

(d)