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Gold/Mining/Energy : International Precious Metals (IPMCF)
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To: Theo who wrote (24934)11/9/1997 10:00:00 AM
From: Bill Jackson  Read Replies (3) of 35569
 
Theo; When assays are done you often include both positive and negative blanks when you ship the stuff to the assay lab.
A positive blank is where you add a known small amount of gold to the sample. A negative blank is where you send them a known zero gold sample. In addition a good lab will also include it's own positive and negative blanks to make sure their process is operating properly and finding the proper amount of gold(positive blank) and has no gold contamination(negative blank).
They will often include the various blanks that they added in its reports identified as blanks, as an assurance to you that it has good controls.

Of course the lab has no idea about your various blanks that you use on a chack of their procedures and reports them as it finds them.

So it is not 'salting' in the usual sense(to fool people), but a technique to measure the labs capabilities.

Bill
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