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This document describes a method for determining the concentration of formaldehyde (formalin) in photographic stabilizer solutions. The method involves adding the sample to excess hypoiodite formed from potassium iodate and potassium iodide, which reduces some of the hypoiodite. The remaining hypoiodite is then titrated with sodium thiosulfate using starch indicator. The formaldehyde concentration is calculated based on the titration results, sample volume, and known properties of formaldehyde solutions. St

Author

Jamilah Ghozy (Mila)

Language

EN