以不对称长链叔胺为中性载体的PVC膜pH电极的研究  

Long-chain Unsymmetrical Tertiary Amines as Neutral Carrier in PVC Membrane pH Electrode

作　　者：曹忠[1] 林辉概[1] 王彬锋[1] 肖丹[1] 沈国励[1] 俞汝勤[1] 

机构地区：[1]湖南大学化学化工系

出　　处：《分析测试学报》1995年第4期1-5,共5页Journal of Instrumental Analysis

基　　金：国家自然科学基金

摘　　要：合成了一系列不对称长链叔胺类化合物作中性载体，研制成ＰＶＣ膜ｐＨ电极。其中（２－羟基苄基）二正癸胺、（β－氰乙基）ＬＡ－２、（２－羟基苄基）ＬＡ－２的电极线性范围分别为ｐＨ２．５～１２．５、ｐＨ２．５～１２．５、ｐＨ３．０～１２．５，斜率分别为５６．６±０．４ｍＶ／ｐＨ、５６．３±０．７ｍＶ／ｐＨ、５５．９±０．３ｍＶ／ｐＨ（３０℃）。这些ｐＨ电极内阻低，响应速度快，性能较稳定，可用于血清样中的ｐＨ值测量。此外，以（２－羟基辛基）ＬＡ－２为载体可制成流通式ＰＶＣ膜ｐＨ内电极型氨气敏电极。A series of long-chain unsymmetrical tertiary amines are synthesized and used as new neutral carriers for preparing PVC membrane pH electrodes. Among the carriers tested, (2-hydroxybenzyl) didecylamine (HBDDA),(β-cyanoethyl)LA-2(CELA),and (2-hydroxybenzyl)LA-2(HBLA)show the best performance,Their linear pH range equal to 2.5～12.5,2.5～12.5,and 3.0～12.5,respectively,while their slope are 56.6±0.4 mV/pH,56.3±0.7mV/pH,and 55.9±0.3 mV/pH(at 30℃),respectively. The electrodes have low resistance,quick potential response,high selectivity,good reproducibility and stable characteristics,and are applied to measuring the pH of serum samples. Ammonia-sensitive probe based on an internal PVC membrane pH electrode with HBLA as a carrier has been prepared too.

关 键 词：中性载体 叔胺 PVC膜 PH电极 

分 类 号：O657.92[理学—分析化学]