Details

Autor(en) / Beteiligte

• GUO Liang-qia NIE Qiu-yan XIE Zeng-hong CHEN Yi-ting CHEN Guo-nan CHEN Xi WANG Xiao-ru

Titel

pH-Sensitive Polymer Matrix with Immobilized Indicator Ion Pairs

Ist Teil von

• Chemical research in Chinese universities, 2002-02, Vol.18 (1), p.8-11

Ort / Verlag

Department of Chemistry, Fuzhou University, Fuzhou 350002, P.R. China%Department of Chemistry, Xiamen University, Xiamen 361005, P.R. China

Erscheinungsjahr

2002

Beschreibungen/Notizen

• A new sensor material for monitoring pH in aqueous solutions is described. It is based on lipophilic ion pairs consisting of an anionic pH indicator Bromocresol Green and a quaternary ammonium cation cetyltri-methylammonium. The ion pairs are homogeneously distributed inside the plasticized PVC membrane. The change of pH in an aqueous solution causes the change of optical property of the indicator immobilized on the plasticized PVC membrane. The plasticized PVC membrane is sensitive in a pH range from 4.0 to 6.0.