International Precious Metals (IPMCF) Message Board

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Gold/Mining/Energy : International Precious Metals (IPMCF)

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To: Zeev Hed who wrote (23232)	10/25/1997 10:06:00 PM
From: E. Charters	Read Replies (1) of 35569

What you have described is the superheated fire assays that those guys in Salt Lake City have been working on since the early 70's. It is a variant on fire assay. All the principles you have described about fluxes are basic principles of the fusion procedure. All refractory metals are known to oxidize with KNO3 by the method standardized by Lakeshore Mines in the 30's. If I did a very high temperature sesquisilicate or trisilciate assay that is what I would get .. I could experiment with several different collectors as many have and I have my proprietary bunch. You can even use tellurium as a collector. The element selenium can make the gold dissolve in the cupel so that could screw things up but you can solve that by finishing AA on the lead button. There may be a fluxing problem with fire and there may be a preg robbing or precipitatory problem with chemical or AA. But a ten step chemical dissolution and precipitation with Hydrogen Cyanate should isolate the gold and give you a chemical determination that is accurate. If there are hydrocarbons that would be the only thing I can conceive that would foil the chemical method. The thing is..what is it that prevents a normal assay? If the gold is merely fine then a gas attack by chlorine and sulfur should get at it .. the Russians have a technique... Finally colloidal gold in hydrocarbons .. algal mats up to a tenth of an ounce with no known method of recovery can be fire assayed accurately and have been for 85 years in Asia. So I realize there are difficult ores to assay .. but where there is a will there is generally a way..and the thing that rankles me is every time these guys step up to the plate they strike out ... Ledoux found gold in their reagants once..I dunno..it is intriguing but there is that funny smell... EC<:-} echarter@vianet.on.ca

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