Michael S. Johnson, John L. Musterman, Removal of Sulfate by Ion Exchange, Journal AWWA, Vol. 71, No. 6, Updating Physical Facilities (June 1979), pp. 343-348 ...

Example Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first. Carbonate ions also produce a white precipitate with barium chloride solution.

Karl Scharf, Richard M. Lee, Investigation of the Spectrophotometric Method of Measuring the Ferric Ion Yield in the Ferrous Sulfate Dosimeter, Radiation Research, Vol. 16, No. 2 (Feb., 1962), pp. 115 ...