Re: formula for platinum standard solution #3 ?
Hi Tom, If I understand your question correctly, you have ammonium tetrachloroplatinate in either powder or liquid form, from which you want to make the traditional standard Pt solution which is 20% Potassium Chloroplatinate (K2PtCl4). I'm no chemist, but I don't think it is possible, at least not without somehow removing the ammonium. Sodium chloride is definitely not involved. That is probably why you can't find a formula. From Arentz, the formula for making the standard Pt solution from powdered K2PtCl4 is: 50 ml distilled water @100° 10 gm potassium chloroplatinate From Ware & Malde, the formula for making ammonium tetrachloroplatinate from powder is: 5 gm ammonium tetrachloroplatinate (II) 20 ml distilled water You probably have these formulas already and were hoping to find something else, but I don't think it exists. Maybe one of the chemists on the list will chime in. Hope this helps, Keith www.jkschreiber.com On Jul 11, 2009, at 7:52 PM, Tom Hawkins wrote: Listmembers,
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