Potentiometric Titration- A Cheaper & Greener alternative to Fire Assay

Gold is the best form of wealth the world has ever known. The Earth’s crust contains an average of 0.004 grams per ton. Gold occurs in association with ores of copper, lead, iron sulfide, in quartz veins, in the gravel found in stream beds, etc. Seawater also contains astonishing amounts of gold, but the process of recovery is not economical.

The Fire assay technique followed by the gravimetric and instrumental finish is widely accepted by the industry for accurate estimation of gold. However, potentiometric methods are also feasible in the analytical community for which several research has been undertaken and still on.

Comparison between Gold titles obtained through optimized Potentiometric Titration and the data achieved by fire assay, gives rise to a very good agreement, that the present method can be rightfully considered a cheaper and “greener” method parallel to the traditional fire assay.