[meteorite-list] nickel test

From: David Freeman <dfreeman_at_meteoritecentral.com>
Date: Thu Apr 22 10:06:57 2004
Message-ID: <3DA332A4.4020304_at_fascination.com>

Dear John and list;
I have been searching again...for this chemical in my NIOSH pocket
guide to hazardous chemicals and find nothing. I am puzzled. I
checked under trade names ans synonyms and still nothing.
Confuzo-Dave 2,3

John Gwilliam wrote:

> Hello All,
> The process described below can result in some false positives. When
> working with such a small test specimen, it is imperative you don't
> contaminate it during handling or preparation. If you cut and polish
> meteorites regularly, you will have an accumulation of dust in your
> work area that contains nickel. Setting your specimen on a table or
> handling it with contaminated gloves can introduce enough nickel to
> result in false positive.
>
> The proper spelling for the chemical being discussed here is
> "Dimethylglyoxime" (2,3-Butanedione Dioxime).
>
> Regards,
>
> John Gwilliam
>
>
> At 10:19 PM 10/7/02 -0400, mafer_at_domafer.com wrote:
>
>> Hi Tom
>> This is out of Meteorites Messengers from space by Heide and Wlotzka:
>> I've
>> added my comments in ()First, a small portion of the metal has to be
>> disolved in acid. This can
>> be achieved by placing a drop of dilute hydrocloric acid 10% on the
>> metal
>> surface. (this is avail all over and may be called muratic acid, the
>> stuff
>> they use in pools...this in my imput not the authors)Atfer some time
>> the acid will become yellow by the disolved iron. It can
>> now be removed with a pipette (or glass eye dropper I should think) and
>> placed on a white porcellain plate. (don't let your wife catch you using
>> her plates and make sure to turn it over and use the unglazed side so
>> you
>> don't introduce outside metals used in the glaze, or use a piece of
>> unglazed floor tile) Here the acid is neutralized with a drop of dilute
>> ammonia. The proof of nickle is accomplished with dimethylgloxime. (you
>> might have to call around for this substance, try some pharmacies, or if
>> you know someone in a university lab, they may have it) A drop of 1%
>> solution of this reagent in alcohol (if you have a 100 ml vial, one
>> percent would be 1 ml of reagent, and fill the vile to the 100 ml line
>> with ethyl alcohol) is applied to the test solution. If nickle is
>> present,
>> a red color or precipitation (precipitation will look like little red
>> flakes, very small)develops.Hope this helps you
>> Mark
>> >
>> > Hello List, Can any one tell me how to do a nickle test in a simple
>> > easy to understand&nbsp; way? I have no back ground in chemistry. : )
>> >
>> > Thanks, Tom
>> >
>> > The proudest member of the I.M.C.A. #6168
>> >
>> > Chat with friends online, try MSN Messenger: Click Here
>> >
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>>
>>
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Received on Tue 08 Oct 2002 03:31:48 PM PDT