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Date: Fri, 11 Dec 1998 08:50:23 -0800
From: Ted Stern <<a href="/scripts/wa.exe?LOGON=A3%3Dind9812%26B%3D--%26E%3D7bit%26L%3DTECHNET%26P%3D772157%26T%3Dtext%252Fplain" target="_parent" >[log in to unmask]</a>>
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Subject: Re: [TN] Gold analysis
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Dear Mr. Doty:

We have employed two methods to measure the gold, gravimetric and AA.
The gravimetric method is consistantly superior (at least within our
lab) in accuracy when RSD and % recovery of a known data were
evaluated.

I understand your concern, as acidification of the gold sample results
in the evolution of hydrogen cyanide gas.  Typlically, the sample size
is small though (< 10 ml) with either the gravimetric or AA method.

Wish I could be of more help.

Regards,
Ted Stern

Michael D. Doty wrote:
>
>      Hello Techies,
>
>                 I have a couple of questions on gold bath analysis. We
>      currently use the gold prospector from Dynatronix. Since they are no
>      longer making these nor supplying test solutions I was wondering what
>      the alternatives might be. I know of the gravimetric method utilizung
>      Nitric and Sulfuric acids but my Lab operators have some major
>      heartburn with this.
>                 Thanks in advance for the help.
>
>      Mike Doty
>      Process Eng.
>      Hadco TCE
>
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