ISO 6638-2:1984 Preview
Fruit and vegetable products -- Determination of formic acid content -- Part 2: Routine method
This standard was last reviewed and confirmed* in 2016.
*Therefore this version remains current
The method consists in quantitative entraining by steam of the acid present in a test portion, determing of the amount of iodine equivalent to the amount of bromine consumed by the acid in the distillate, by titration with sodium thiosulfate standard volumetric solution.