ISO 910:1977
Sulphuric acid and oleum for industrial use; Determination of total acidity, and calculation of free sulphur trioxide content of oleum; Titrimetric method

Standard No.

ISO 910:1977

Release Date

1977

Published By

International Organization for Standardization (ISO)

Latest

ISO 910:1977

Scope

Two cases are considered: sulphuric acid contents equal to or lower than 98 % (m/m) and sulphuric acid contents higher than 98 % (m/m). The principle is based on oxidation of a test portion with hydrogen peroxide and titration of the total acidity with a standard volumetric sodium hydroxide solution, in the presence of methyl red as indicator. - Replaces ISO Recommendation R 910-1968.

ISO 910:1977 history

• 1977 ISO 910:1977 Sulphuric acid and oleum for industrial use; Determination of total acidity, and calculation of free sulphur trioxide content of oleum; Titrimetric method