@article{oai:u-ryukyu.repo.nii.ac.jp:02006865,
 author = {当真, 嗣徳 and Tōma, Shitoku},
 issue = {11},
 journal = {琉球大学理工学部紀要. 理学編, Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences},
 month = {May},
 note = {Visible absorption spectra were taken between 320 and 440 millimicrons, and between 500 and 600 millimicrons in various pH with the aqueoue solutions (2.5×10^-4mol/l) of methylorange. A dissociation constant K of monobasic acid is determined as follows :(数式については省略)\nεHA is moleclar absorption coefficient in far acid solution (PH= 1.90） εＡ^-　is in\nfar basic solution (PH=11.70) and ε is in medial. As the concentrations of these　solutions are identical, εHA, εA^- and ε are substituted by the optical densities, respectively.\nThe electric dissociation constant of methylorange has been measured as pK = 3.20., 紀要論文},
 pages = {45--50},
 title = {メチルオレンジの電離定数の測定について。熱力学的諸量の分光化学的研究（第4報）},
 year = {1968}
}