ISO 119:1977

Plastics — Phenol-formaldehyde mouldings — Determination of free phenols — Iodometric method

A semiquantitative method for the determination of the amount of free phenols in phenolic mouldings. Hot water extraction of free phenols from a powdered test portion, iodination of the water extract and backtitration of the excess of iodine with standard volumetric thiosulfate solution.