Reference number
ISO 2516:1973
ISO 2516:1973
© ISO 2024
ISO 2516:1973
Ammonium hydrogen carbonate for industrial use (including foodstuffs) — Determination of total alkalinity — Volumetric method
Edition 1
1973-04
1973-04
Retirada
Resumen
The principle of the analysis consists in acidification of a test solution by addition of an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of methyl red- methylene blue mixed indicator.