Palladium precipitation with ascorbic acid - preferable conditions ?

[ólom]

You can do this, but you will need to adjust the pH. Ascorbic for Pd does not work in very acidic conditions. If you have de-noxed AR solution, pH of 1,5 is relatively OK for drop (with heating). Without de-noxing, you will need to go much higher with pH, and it will cause other metals to also reduce, like copper, bismuth etc.

Ascorbic is not the best for selective drop of Pd, however it does great job if you need to just convert Pd liquid to the metal - it does not add any metal ions, it just reduce the palladium. It can be done in matter of minutes. With formate reduction it can take hours of boiling.

Thanks for the reply!

 

[fabriciomnarvaez]

I did the PD precipitation test with ascorbic acid, in a solution of PD and RH, the PD precipitated into a dark powder, similar to when cementing, precipitation under these conditions has to be with PH 2 to 3 and stirring in water to better results, but I had a question, as it turned out dark in color, has it already precipitated metallic, ready to melt?