The determination of sulfate in oilfield and sea water samples is very important for the control of barium, strontium, and calcium sulfate scale formation when two or more types of water are mixed in waterflood operations. It is certainly economically feasible to avoid scale formation.
Maria I. Couto and Adilson J. Curtius, "Indirect Analyses of Sulfate in Brines by Atomic Absorption," Appl. Spectrosc. 34, 228-229 (1980)