ISO 743:1976 PDF
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Sodium carbonate for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
The principle in dissolution of a test portion and separation of the insoluble matter. Precipitation of sulphate as barium sulphate in dilute hydrochloric acid medium. Separation of the precipitate obtained and ignition at 800 °C +- 25 °C and weighing. The method is applicable to products having a sodium sulphate content equal to or greater than 0,01 % (m/m). Replaces ISO Recommendation R 743-1968.
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| Edition | 1976 |
|---|---|
| Published Date | 1976 |
| Published By | International Standardization Organisation |
| Page Count | 3 |
