養魚池水の溶存酸素定量法に関する若干の検討

概要

論文の詳細を見る
Four different methods for the determination of the dissolved oxygen in the water-WINKLERs iodometric method, MILLER-SIBATAs ferrous method, WINKLER-SUGAWARAs carbon dioxide method, and VAN SLYKEs manometric method-were compared. The dissolved oxygen content in the water which is abundant in micro-phytoplankton is undervalued by WINKLERs method owing to adsorption of iodine to the plankton, and is overvalued by MILLER-SIBATAs owing to indistinctiveness of the end-point of the titration. Both the accuracy and precision in MILLER-SIBATAs decrease accordingly as the salinity of the water increases, because certain cations in it may be partly precipitated by the hydroxide ion in the reagent. WINKLER-SUGAWARAs and VAN SLYKEs methods are generally accurate, and the former is good in the precision as well as in the accuracy.
公益社団法人日本水産学会の論文