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ASTM E359-26

Standard Test Methods for Analysis of Soda Ash (Sodium Carbonate)
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ASTM E359-26

Standard Test Methods for Analysis of Soda Ash (Sodium Carbonate)

PUBLISH DATE 2026
PAGES 13
ASTM E359-26

1.1 These test methods cover the analyses usually required on commercial soda ash (sodium carbonate).

1.2 The analytical procedures appear in the following sections:

  • Total Alkalinity, Titrimetric — Sections 8 – 15
  • Sodium Bicarbonate, Titrimetric — Sections 17 – 24
  • Loss on Heating, Gravimetric — Sections 26 – 32
  • Moisture, Calculation — Sections 34 – 38
  • Sodium Chloride, Titrimetric — Sections 40 – 46
  • Sodium Sulfate, Gravimetric — Sections 48 – 54
  • Iron, Photometric — Sections 56 – 64
  • Sieve Analysis — Sections 66 – 72

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazards statements are given in Section 6.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

3.1 Soda ash is used in a number of manufacturing processes.

The procedures listed in 1.2 are suitable for specification acceptance and manufacturing control of commercial soda ash.

SDO ASTM: ASTM International
Document Number E359
Publication Date May 1, 2026
Language en - English
Page Count 13
Revision Level 26
Supercedes
Committee D16.12
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