液体四二酸化窒素中の三二酸化窒素の吸光光度定量法

抄録

Liquid N₂O₄ is so hygroscopic that it reacts easily with a trace amount of water turning its color into dark green. This change of color is due to the formation of N₂O₃, which is apt to dissociate into NO and N₂O₄with a rise of temperature. In this study, preparation method of N₂O₄ containing N₂O₃ at low temperature (-10°C), its dilution solvents and visible absorption spectra were investigated. From the relationship between water content and absorbance at 665 mμ, determination of N₂O₃ in liquid N₂O₄ has become possible as low as about 2 vol%. A mechanism of the reaction between liquid N₂O₄ and water was also discussed.