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.
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