Abstract
A method suitable for compendial assay of barium sulfate USP has been developed. Barium is separated as the carbonate and precipitated as the chromate. Calcium, strontium, and silica do not interfere. The calcium and strontium content may be determined by atomic absorption or X-ray fluorescence and silica by a colorimetric procedure. An in vitro study of the extractability of strontium and lead from barium sulfate into simulated gastric and intestinal fluids was performed. A method suitable for compendial assay of barium sulfate USP has been developed. Barium is separated as the carbonate and precipitated as the chromate. Calcium, strontium, and silica do not interfere. The calcium and strontium content may be determined by atomic absorption or X-ray fluorescence and silica by a colorimetric procedure. An in vitro study of the extractability of strontium and lead from barium sulfate into simulated gastric and intestinal fluids was performed.
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