Note: Please consider that the PGM (Pt, Pd, Rh) content might change from one catalytic to another (with the same serial #) due to its condition affected by mileage, weather conditions, etc. *Assay made with Niton XLT3GOLDD+
Measuring and Using Density of Precious Metals & Their Alloys as a Tool for Quality Control
Density is a measure of substance mass per volume.
The symbol mostly used to display density is ρ (rho). ρ = m/V
A simple method to determine the density is by using the principle of immersing a body into a fluid on a scale. The fluid level “goes up” according to the body volume and the weight “goes up” according the body’s volume multiplied by the fluid density.
When using distilled water (ρ = 1), the extra weight in gram will be equal to the volume in cm³ of the body.
An example: Measuring the density of pure silver using this method;
Calculate the density ρ = m/V
In this example: ρ = m/V = 100/9.5 = 10.5
Compare result with the theoretical density as a quality control tool.
For the density table of the precious metals and some of their alloys, please click here.