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.
Status : WithdrawnPublication date : 1973-04
Edition : 1Number of pages : 1
A standard is reviewed every 5 years
Revisions / Corrigenda