This standard is issued under the fixed designation C 471M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. | dQTk Designation C 471M - 96 ulr METRIC Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products Metric 1 This standard is issued under the fixed designation c 47 M the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last rerpprovrl. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 1. Scope These test methods cover the chemical analysis of gypsum and gypsum products including gypsum ready-mixed plaster gypsum wood-fibcrcd pllisscr and gypsum conerdc. Note 1 Gypsum reference sUiiidard material prepared bv lomikir. Inc are available through Brammer Standards Company Inc. The test methods appear in the following order Sections Alternative Procedure for Analysis for Calcium Sulfate by Ammonium Acetate Method 17-22 Alternative Procedure for Analysis for Sodium Chloride by the Coulo- metric Method 23-29 Complete Procedure 5-16 Determination of Sand in Set Plaster 30-36 Optional Procedure for Analysis for Sodium by Flame Photometry 47-54 Optional Procedure for Analysis for Sodium by the Atomic Absorp- tion Method 40-46 Preparation of Sample 4 Wood-Fiber Content in Wood-Fiber Gypsum Plaster 37-39 The values stated in SI units are to be regarded as the standard. This standard does not purport to address all of the safety concerns if any associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents ASTM Standards C 11 Terminology Relating to Gypsum and Related Gypsum Building Materials and Systems2 C 22 C 22M Specifcaúon for Gypsum2 C 28 Specification for Gypsum Plasscrs2 C 59 Specifica on for Gypsum Casúng and Mooding Plnas ter2 C 61 Specif carton for Gypsum Keene s Cement2 C 317 Specification for
