The principle is based on the addition of a test portion, under specified conditions, of potassium permanganate solution. Determination of the time taken for the colour of this test solution to match that of a cobalt(II) chloride and uranyl nitrate colour standard. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.
WITHDRAWN
ISO/R 1388:1970
PUBLISHED
ISO 1388-12:1981
90.93
Standard confirmed
Nov 29, 2023