[Jewelry making - Article 00201] - [Orchid] Argent I need your help.

[diamon diamon]

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    Dear Sir.... At the beginning i would like to inform you about my
    self. My name is Raiya AL-Esry. I'am working in the Assay Laboratory
    as a chemist.I would like to have your helps in the following problem
    with my solution. We prepare solution of Nitric Acid ( HNO3) 33% with
    concentration of 24Bums( density = 1.2) whichused to paration
    silver(Ag) from Gold(Au) as mention In ISO11426, Also we used water(
    PH=7.4) but after 5minute -1 days we found the concentration of
    solution( HNO3) higher than before around 34Bums( 46%) . SO why did
    you thing this happen is it effect with the following :- 

	PH of water is higher?
	Room Temperature?

    At the end thanks a lot , Sorry to disturb you 

Best Regards
Raiya AL-Esry.
Head of precious metal Laboratory


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