pH-Sensitive Polymer Matrix with Immobilized Indicator Ion Pairs

来源 :高等学校化学研究 | 被引量 : 0次 | 上传用户：wonghost

【摘要】

：

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

【作者】

：

GUO Liang-qia NIE Qiu-yan XIE

【机构】

：

Department of Chemistry

【出处】

：

高等学校化学研究

【发表日期】

：

2004年期

【关键词】

：

Bromocresol green pH PVC membrane

【基金项目】

：

Foundation for University Key Teacher by the MOE;福建省自然科学基金;Three Projects of Science and Technology of Fujian Province

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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.

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pH-Sensitive Polymer Matrix with Immobilized Indicator Ion Pairs

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