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, [EMAIL PROTECTED] 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 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 >> > >> > ______________________________________________ >> > Meteorite-list mailing list >> > [EMAIL PROTECTED] >> > http://www.pairlist.net/mailman/listinfo/meteorite-list >> >> >> >> >> ______________________________________________ >> Meteorite-list mailing list >> [EMAIL PROTECTED] >> http://www.pairlist.net/mailman/listinfo/meteorite-list > > > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://www.pairlist.net/mailman/listinfo/meteorite-list > > ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
