Thanks bro, but the gold is invisible and its inside the crucible Component.4metals said:If the gold and silver is in the form of visible beads you can crush the crucibles into powder in a ball mill and screen the powder, the beads will remain in the oversize fraction where they can be collected and melted into a bar.
I have XRF, and I take samplees and read it by XRF.rewalston said:hmm invisible gold...if it's invisible what tests have you done to conclude that there is any gold or silver left in the crucibles?
Abstract
It is well known that the preparation of metals and liquids for XRF analysis is fast, easy, and
usually requires little strategy. The preparation of powder samples such as silicates, carbonates,
slags, cements, ferro-alloys and other powdered materials however requires careful planning in
the way of additives, lubricants, binders, dilution, backing and holders. The ratio of binder to
sample must include forethought regarding the homogeneity of the briquette, the stability of the
briquette, the cleaning and cleanliness of the grinding vessel, and the performance requirements
of the analysis. The ideal situation would be to have one set of preparation materials, with only
one sample to additive ratio suffice for all powder preparations. Various preparation materials
and strategies are examined, and their usefulness toward achieving a universal preparation
method considered.
Most commercial laboratories offering XRF analyses use either the pressed powder
pellet (also referred to as a powder briquette) or fused glass bead (fusion bead) sample
preparation techniques.
4metals said:Looks like there's still a use for us old fire assayers.
It's nice to be needed!!!!
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