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离子选择性微电极的尖端直径可小至1μm以下,其内阻可达10~(11)Ω,因此,在应用中,需要高输入阻抗的测试仪器与其配合。一些作者从提高测试仪器的输入阻抗上作了努力;也有作者从微电极形式上作了改进,降低内阻及缩短响应时间。对于影响微电极内阻的因素,尚未见到较完整的报道。本文较详细地探讨了微电极形状、敏感膜中PVC和增塑剂及活性物质的含量、温度等几个主要因素对微电极内阻及性能的影响。本工作对提
Ion-selective microelectrode tip diameter can be as small as 1μm, the internal resistance of up to 10 ~ (11) Ω, therefore, in applications requiring high input impedance test equipment to match. Some authors have made efforts to increase the input impedance of test instruments; others have made improvements in the form of microelectrodes to reduce internal resistance and shorten the response time. For the factors that affect the internal resistance of the microelectrode, we have not seen a more complete report. This article discusses in more detail the microelectrode shape, the sensitivity of the film PVC and plasticizer and the content of active substances, temperature and other several major factors on the internal resistance and performance of the microelectrode. This work on the mention