CO(2)对聚合物膜 ISFET 的影响及碳酸根离子传感器的特性研究。
The influence of CO(2) on ISFETs with polymer membranes and characterization of a carbonate ion sensor.
机构信息
Instituto de Microelectrónica de Barcelona (IMB-CNM-CSIC), Campus UAB, Bellaterra, Barcelona, Spain.
出版信息
Talanta. 2010 Jun 15;81(4-5):1750-4. doi: 10.1016/j.talanta.2010.03.034. Epub 2010 Mar 25.
The influence of CO(2) and acetic acid on the response of ISFET sensors with PVC and photocured polyurethane polymer membranes with valinomycin as an ionophore was assessed. Experimental results show that the presence of these compounds has no effect on sensors parameters even after prolonged soaking in a water solution. Using a photocured polyurethane polymer as an ion-selective membrane matrix for an ISFET, a carbonate ion sensor was developed with hexyl-p-trifluoroacetylbenzoate (HE) as an ionophore. Effect of cationic and anionic lipophilic additives on the sensors response was studied. Sensors with the optimized membrane composition based on HE (7.9%, w/w) and tridodecylmethylammonium chloride (5.7%, w/w) show sensitivity of 27-30mV per decade of carbonate ion concentration, sufficient selectivity in front of chloride ions, and a lifetime of 3-5 months.
评估了 CO(2)和乙酸对以缬氨霉素为离子载体的 PVC 和光固化聚氨酯聚合物膜的 ISFET 传感器响应的影响。实验结果表明，即使在长时间浸泡在水溶液中后，这些化合物的存在对传感器参数也没有影响。使用光固化聚氨酯聚合物作为 ISFET 的离子选择性膜基质，用己基-p-三氟乙酰基苯甲酸酯（HE）作为离子载体开发了一种碳酸根离子传感器。研究了阳离子和阴离子亲脂添加剂对传感器响应的影响。基于 HE（7.9%，w/w）和三辛基甲基氯化铵（5.7%，w/w）的优化膜组成的传感器对碳酸根离子浓度的响应具有 27-30mV 每十年的灵敏度，对氯离子具有足够的选择性，并且寿命为 3-5 个月。
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