Abstract
In order to determine sulfides in steel, electrolyte dissolution of matrix and extraction of sulfides from the electrolytic residue were studied.
The results are as follows:
(1) The use of small quantity of citric acid-sodium citrate solution of pH 4.0 as electrolyte has made the extraction procedure more rapid and easy to operate. Furthermore the extraction of sulfides can be quantitatively made.
(2) By treating the residue with hydrogen peroxide and the subsequent determinations of dissolved metal ions, MnS is determined with reasonable accuracy but FeS not.
