title: [Study of the pH sensitive polymer].
abstract: A pH sensitive polymer was prepared by copolymerization of methacrylic acid as monomer, diethylene glycol dimethacrylate as cross-linking reagent, heptane as porogen, and fluorescent dye eosin as indicator. The factors of influence on the preparation, and the character of the pH sensitive polymer for pH were studied. The maximal emission wavelength of eosin was red shifted in the polymer than in solution, the apparent Ka largened, and the dissociation equilibrium of indicator was shifted to acidity direction, because the polarity of polymer diminished. Under the optimal condition, the calibration curve of the pH sensitive polymer covered the range of pH 0-3.0 with good reproduction and reversibility.
authors.affiliation: Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou 350002, China.
authors.forename: Liang-Qia
authors.initials: LQ
authors.lastname: Guo
authors.forename: Zeng-Hong
authors.initials: ZH
authors.lastname: Xie
authors.forename: Xu-Cong
authors.initials: XC
authors.lastname: Lin
authors.forename: Xiang-Hua
authors.initials: XH
authors.lastname: Zheng
authors.forename: Mao-Sheng
authors.initials: MS
authors.lastname: Zhang
authors.forename: Guo-Nan
authors.initials: GN
authors.lastname: Chen
mesh_terms: D000179:Acrylates / Q000737:chemistry; D004801:Eosine Yellowish-(YS) / Q000737:chemistry; D005026:Ethylene Glycols / Q000737:chemistry; D006536:Heptanes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008689:Methacrylates / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D000179:Acrylates; D005026:Ethylene Glycols; D006536:Heptanes; D008689:Methacrylates; D011108:Polymers; C008384:methacrylic acid; C047521:diethylene glycol dimethacrylate monomer; D004801:Eosine Yellowish-(YS)