The iron powder i talk about is the one found in this link
http://www.sigmaaldrich.com/catalog/search/SearchResultsPage/PricingAvailability/RIEDEL;12312 1 Kg pack
it is a standard solution i think Iron(0) is correct
ok i'll try and see
6N HNO3? i didn't try to use it, thanks for the advice.
thanks for the advice, and how is your friend now?
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it is ok my friend we all learn
thanks for the information
At the end and to be...