The standard method of measuring for the purity of gold dust
The principle of measuring the purity of gold dust is to determine
the true volume of dust by the method of Archimedes' and then
according to the dust mass to calculating dust purity of gold.
The measuring key of the purity of gold dust is testing the true volume of gold dust.
The most important for testing gold dust true
volume is exhaust the bubbles between pores of gold dust.
It is a very accurate method to measuring gold dust or particle purity by pycnometer method.
The testing technique summary of the purity of gold dust:
The purity of gold dust is the ratio of gold dust weight to true volume.
True volume excludes the closed space in gold dust particles.
Therefore, the pore-free material can be used to testing the gold dust true density.
According to different measuring medium, gold
dust true density also has the different measuring method.
Generally speaking, it can be classified as gas volume method and immersion method.
The true density impregnation method is described below.
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