I read advices to boil precipitated gold powder in hydrochloric, nitric, sulfuric acid, wash with ammonia and use more substances. What do you think about boiling precipitated gold powder boiling in HCl, where several drops of nitric are added (such a very weak AR)?
Till this moment I boiled the powder in HCl, but after some thinking decided, that very weak AR is better to use, as HCl, because HCl have no deal with copper, palladium, platinum and much more materials, which could be captured precipitating gold from not very clean solutions.
What do you think about this?
Till this moment I boiled the powder in HCl, but after some thinking decided, that very weak AR is better to use, as HCl, because HCl have no deal with copper, palladium, platinum and much more materials, which could be captured precipitating gold from not very clean solutions.
What do you think about this?