qst42know
Well-known member
The most common answer given for testing pewter for lead is to dissolve a sample in dilute nitric acid and add a drop of potassium iodide.
So here is the problem with this method. Lead iodide is a yellow precipitate, and tin iodide is a yellow-orange precipitate. It seems to me this method leaves a lot of room for interpretation and isn't very definitive.
Is there a more accurate test that doesn't require expensive testing equipment or a high degree of guess work?
So here is the problem with this method. Lead iodide is a yellow precipitate, and tin iodide is a yellow-orange precipitate. It seems to me this method leaves a lot of room for interpretation and isn't very definitive.
Is there a more accurate test that doesn't require expensive testing equipment or a high degree of guess work?