THE VARIOUS METALLIC SALTS OF THE RESINOUS ACIDS.
After obtaining the potassium salts of the acids and having freed the same from the excess of the potassium hydroxide and potassium carbonate, the possibilities of the formation of different metallic salts were tried.
The soluble salts of the following metals yielded precipitates:—
- Manganese
- Barium
- Cobalt
- Silver
- Mercury
- Iron
- Zinc
- Copper
- Calcium
- Lead
The following metallic salts gave a complete precipitation:—
- Silver
- Iron (ferric)
- Manganese
Since the barium and iron (ferric) salts gave the best means of separation, they were used to separate the resins.
THE TOTAL RESINS.
The total resins were brown in color, thick syrupy consistency and possessed the characteristic odor of the drug.
A molecular weight determination was made in the same manner as with the Barium acids, and the following data obtained.