title: Ratiometric fluorescence response of N-methylacridone for methanesulfonic acid.
abstract: A new method for the sensitive and selective determination of stronger acids, such as methanesulfonic acid, based on an acid-base interaction with N-methylacridone fluorophore (1), is proposed. The fluorescence spectrum of 1 was changed drastically by the addition of methanesulfonic acid in methanol. A ratiometric analysis of methanesulfonic acid by measuring the fluorescence intensities of 1 both at 426 nm and 473 nm showed good linearity with a correlation coefficient of 0.9995.
authors.affiliation: Daiichi College of Pharmaceutical Sciences, Tamagawa-cho, Minami-ku, Fukuoka 815-8511, Japan. tmasuda@daiichi-cps.ac.jp
authors.forename: Toshinobu
authors.initials: T
authors.lastname: Masuda
authors.forename: Sadatake
authors.initials: S
authors.lastname: Uda
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Kamochi
authors.forename: Akira
authors.initials: A
authors.lastname: Takadate
mesh_terms: D000166:Acridines / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence; D013441:Sulfinic Acids / Q000737:chemistry*
chemical_list: D000166:Acridines; C518162:N-methylacridone; D013441:Sulfinic Acids; C053310:methanesulfinic acid