pH-Sensitive Polymer Matrix with Immobilized Indicator Ion Pairs

Chemical Research in Chinese Universities ›› 2002, Vol. 18 ›› Issue (1): 8-11.

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pH-Sensitive Polymer Matrix with Immobilized Indicator Ion Pairs

GUO Liang-qia¹, NIE Qiu-yan¹, XIE Zeng-hong¹, CHEN Yi-ting¹, CHEN Guo-nan¹, CHEN Xi², WANG Xiao-ru²

1. Department of Chemistry, Fuzhou University, Fuzhou 350002, P. R. China;
2. Department of Chemistry, Xiamen University, Xiamen 361005, P. R. China

Received:2000-12-14 Online:2002-01-24 Published:2011-08-04
Supported by:
Supported by Foundation for University Key Teacher by the MOE, the Natural Science Foundation of Fujian Province of China(No.D9910009), Three Projects of Science and Technology of Fujian Province(No.K99037).

Abstract

Abstract: 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.

Key words: Bromocresol green, pH, PVC membrane

GUO Liang-qia, NIE Qiu-yan, XIE Zeng-hong, CHEN Yi-ting, CHEN Guo-nan, CHEN Xi, WANG Xiao-ru. pH-Sensitive Polymer Matrix with Immobilized Indicator Ion Pairs[J]. Chemical Research in Chinese Universities, 2002, 18(1): 8-11.

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pH-Sensitive Polymer Matrix with Immobilized Indicator Ion Pairs

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