Assaying of Gold……… Low cost Alternative ?..... Imagine the Possibility !!

Gold determination by Cupellation Method has enjoyed wide acceptance among the Hallmarking Centres. However, the analysis is quite cumbersome, time-consuming , space intensive, requires high cost microgram balance & uses not only high wattage of power for the furnaces but also calls for heavy duty power back . In addition, the serious health hazards associated with handling Lead during the cupellation process cannot be overlooked.

The question that comes to mind …… Is there any other reliable & economical technique to do Gold Analysis ??

And the answer is Yes!

In this short note we describe a direct Potentiometric (Volumetric) Titration Method for Assaying of Gold Alloys.

Experimental
The Potentiometric Titrations were carried out using Gold Titrator, equipped with a Platinum Electrode and a saturated Calomel Reference Electrode as shown below.


Gold Titrator

Reagents
Titrant : Ferrous Solution.

Sample Preparation
Gold sample solution.

Analysis
The above prepared solution is taken in the titration vessel and titrated against Ferrous solution using Gold Titrator under computer control.

Analysis Curve
The analysis curve can be seen & results obtained can be printed. The accuracy of the proposed Method was tested by replicate determinations of gold in a sample.

Conclusion
The Potentiometric Titration Method for Gold determination in Gold Alloys gave reproducible results. An additional advantage of the Potentiometric Method is its low cost and thus would also be of great interest and help in the Referee Analysis of Gold Alloys for use in Hallmarking Centres & Assay Labs, Precious Metals Refining Units…..

Imagine the Possibility……economical alternative to Cupellation, CKARAT XRF (gives only skin purity)……………....
Interested……….??

 

 
 
Instrumentation ........................................................ and beyond