Abstract
The chromium and the vanadium contents of solar salt and home product salt were determined colorimetrically with the diphenylcarbazide method and the sodium diphenylamine sulfonate method, respectively, after being collected by coprecipitation with ferric hydroxide in the water soluble part.
While, those of the water insoluble matter were directly determined after being incinerated and treated with hydrofluoric acid-sulfuric acid mixture.
0.149 p.p.m. Cr and 0.33 p.p.m. V in the solar salt and 0.008 p.p.m. Cr and 0.09 p.p.m. V in the home product salt.
The most of the chromium and the vanadium were contained in the water insoluble matter. These elements in the solar salt were derived mainly from the soil of the salt field, and it was presumed that those in the home product salt were derived from sea water and the salt making apparatus.
