ASTM C471M-16a

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C471M − 16 C471M − 16a
Standard Test Methods for
Chemical Analysis of Gypsum and Gypsum Products
1
(Metric)
This standard is issued under the fixed designation C471M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 These test methods cover the chemical analysis of gypsum and gypsum panel products, including gypsum ready-mixed
plaster, gypsum wood-fibered plaster, and gypsum concrete.
1.2 The test methods appear in the following order:
Sections
Preparation of Sample 4
Complete Procedure 5 – 16
Alternative Procedure for Analysis of 17
Free Water in Gypsum Using a Mois-
ture Balance
Alternative Procedure for Analysis of 18
Combined Water in Gypsum Using a
Moisture Balance
Alternative Procedure for Analysis for 19
Calcium Sulfate by Ammonium Acetate
Method
Alternative Procedure for Analysis for 20
Sodium Chloride by the Coulometric
Method
Determination of Sand in Set Plaster 21
Wood-Fiber Content in Wood-Fiber Gyp- 22
sum Plaster
Optional Procedure for Analysis for So- 23
dium by the Atomic Absorption Method
Optional Procedure for Analysis for So- 24
dium by Flame Photometry
Determination of Orthorhombic Cyclooc- 25
tasulfur (S ) in Ggypsum Panel
8
Products—General Provisions
Determination of Orthorhombic Cyclooc- 26
tasulfur (S ) in Gypsum Panel Prod-
8
ucts by Gas Chromatograph Equipped
with a Mass Spectrometer (GS/MS)
Determination of Orthorhombic Cyclooc- 27
tasulfur (S ) in Gypsum Panel Prod-
8
ucts by Gas Chromatograph Equipped
with an Electron Capture Detector
(GC/ECD)
Determination of Orthorhombic Cyclooc- 28
tasulfur (S ) in Gypsum Panel Prod-
8
ucts by High-performance Liquid Chro-
matograph Equipped with and
Ultraviolet Detector (HPLC/UV)
Sections
Preparation of Sample 4
Complete Procedure 5 – 16
Alternative Procedure for Analysis of Free Water in 17
Gypsum Using a Moisture Balance
1
These test methods are under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and are the direct responsibility of
Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved Jan. 1, 2016June 15, 2016. Published January 2016July 2016. Originally approved in 1961. Last previous edition approved in 20142016 as
C471 – 14.C471M – 16. DOI: 10.1520/C0471M-16.10.1520/C0471M-16A.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C471M − 16a
Alternative Procedure for Analysis of Combined Water in 18
Gypsum Using a Moisture Balance
Alternative Procedure for Analysis for Calcium Sulfate by 19
Ammonium Acetate Method
Alternative Procedure for Analysis for Sodium Chloride by 20
the Coulometric Method
Determination of Sand in Set Plaster 21
Wood-Fiber Content in Wood-Fiber Gypsum Plaster 22
Optional Procedure for Analysis for Sodium by the Atomic 23
Absorption Method
Optional Procedure for Analysis for Sodium by Flame 24
Photometry
Determination of Orthorhombic Cyclooctasulfur (S ) in 25
8
Ggypsum Panel Products—General Provisions
Determination of Orthorhombic Cyclooctasulfur (S ) in 26
8
Gypsum Panel Products by Gas Chromatograph
Equipped with a Mass Spectrometer (GS/MS)
Determination of Orthorhombic Cyclooctasulfur (S ) in 27
8
Gypsum Panel Products by Gas Chromatograph
Equipped with an Electron Capture Detector (GC/ECD)
Determination of Orthorhombic Cyclooctasulfur (S ) in 28
8
Gypsum Panel Products by High-performance Liquid
Chromatograph Equipped with and Ultraviolet Detector
(HPLC ⁄UV)
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.4 The values stated in SI units are to be regarded as the standard.
1.5 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
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Ma
...