[meteorite-list] Nickel test

From: Ingo Herkstroeter <metopaster_at_meteoritecentral.com>
Date: Fri Jan 6 09:49:28 2006
Message-ID: <17594.1136558964_at_www57.gmx.net>

Hi Pierre-Marie and List!

I had problems with the Ni-test (with dimethylglyoxime) too. The problem is,
that this substance shows a reaction with Fe2+-ions too. So you don?t know,
if the pink reaction shows truly Ni or only iron (iron dissolves much more
better in HCl than Ni)!
It seems that there is only one way to be sure: use also H202
(hydrogenperoxide or hydrogensuperoxide) to oxidise the Fe2+-ions, than
testing with dimethylglyoxime. If you see pink, it?s Ni!

Hope this will help you.

Ingo/Germany


 --- Urspr?ngliche Nachricht ---
> Von: Pel? Pierre-Marie <pierremariepele_at_yahoo.fr>
> An: MeteoriteList <meteorite-list_at_meteoritecentral.com>
> Betreff: [meteorite-list] Nickel test
> Datum: Fri, 6 Jan 2006 15:05:37 +0100 (CET)
>
> Hello to the List,
>
> a short question : is it possible that the Nickel Test
> is positive to terrestrial irons (or usual old iron
> forge residues) and which ones ?
>
> Best regards,
>
> Pierre-Marie PELE
>
>
>
>
>
>
>
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Received on Fri 06 Jan 2006 09:49:24 AM PST