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ISO 9501:1991 Metallurgical-grade fluorspar -- Determination of total sulfur content -- Iodometric method after combustion
standard by International Organization for Standardization, 02/01/1991
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The method given is applicable to fluorspars having sulfur contents in the range 0,01 % (m/m) to 1,0 % (m/m). Describes in detail: principle, reagents and materials, apparatus, test sample, procedure, expression of results, and test report. Annex A gives values of total sulfur content of metallurgical grade fluorspars obtained in interlaboratory trials using the iodometric method after combustion specified in this standard.