It sometimes falls to the lot of the assayer doing commercial work or working in a mining camp to retort the amalgam taken from the
Why Distilled Water In all operations in assaying and chemical analysis it is desirable to use distilled water. There are very few places where the
The general method of assaying copper values is by what is termed the “wet” process, that is volumetric determination by titrating with standard solution of
Description of Touch Stone and Test Needles The touch or test stone is practically a small black whetstone. Test needles (Fig. 47) are a number
General Flux In a laboratory where much work is done in a day, and the class of ore is uniform, what is called a “general
Analytical Balances Buy a good button balance, for should the final weighing of the gold or silver recovered from an assay charge be inaccurate, all
Usual Charge Mix 10 grams of the pulped ore with 40 grams of pulverized potassium cyanide. Melting Put the charge into a 20 gram crucible
Drilling Bullion Bar for Sampling Bullion submitted for assay is usually brought in the form of bars, bricks, slugs or buttons, and a sample of
Definition of Term Scorification: Scorification may be defined as a reduction and a partial or preliminary cupellation successively performed in the same container without removal of
Classification of Ores In fluxing ore for gold and silver, first determine the nature of the sample submitted for assay. Three different classifications may be