固定刚果红的交联聚乙烯醇光化学pH敏感膜  

Photo Chemical pH Sensitive Membrane of Cross-linking PVA with Congo Red Fixed on It

作　　者：罗发亮[1] 刘志宏[1] 陈天禄[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022

出　　处：《应用化学》2005年第3期233-237,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(50273037)资助项目

摘　　要：以聚乙烯醇为载体,用不同的交联剂环氧氯丙烷与甲醛将聚乙烯醇交联成膜,再固定刚果红,制备了2种可用于光导纤维pH传感器的敏感膜(PECM和PFCM). 线性响应范围分别为2 mol/L [H+]～pH 6.8和pH 2.9～5.4. 2种膜在溶液pH值变化相差1和2个pH单位时,在10 s内达到响应平衡. 分析结果表明,此2种膜均有较好的响应重现性与可逆性.Two kinds of photo chemical pH sensing membranes PECM and PFCM, for optic pH sen sors, with epichlorohydrin cross-linked PVA and formaldehyde cross-linked PVA gel as matrices are described. Their pH linear response ranges are within 2 mol/ L \~pH 6.8 and pH 2.9~pH 5.4, respectively. The response time of both the membranes is less than 10 s when ΔpH is within 2 pH units. Experim ental results show they have good reproducibility and reversibility.

关 键 词：聚乙烯醇 pH敏感膜 刚果红 

分 类 号：O653[理学—分析化学]