钾离子选择性液膜超微电极的研制  

Valinomycin-based K￣+ Selective Microelectrodes with Low Electrical Membrane Resistance

作　　者：吴芯芯[1] 赵平三 漆德瑶[1] 

机构地区：[1]上海大学化学与化学工程学院

出　　处：《上海大学学报（自然科学版）》1995年第3期280-284,共5页Journal of Shanghai University:Natural Science Edition

摘　　要：本文报道一个膜内阻很低的缬氨霉素钾离子选择性液膜微电极．当电极端径１μｍ和０．５μｍ时，电极内阻分别为１×１０１０Ω和７×１０１０Ω．该电极的选择性很好，允许钠和乙酰胆碱的干扰量分别可达５０００和３４００倍．在０．１４ｍｏｌ／Ｌ和０．５ｍｏｌ／ＬＮａ＋存在下，检测极限分别为１．６×１０－５ｍｏｌ／Ｌ和２．５×１０－５ｍｏｌ／Ｌ．Avalinomycin-based membrane for K+ microelectrodes with relatively low electric membrane resistance is described .Microelectrodes with tip diameters of 1μm and 0.5μm exhibit resistances of 1×1010Ωand 7×1010Ωrespectively.At a constant background of 0.14mol/L AND 0.5MOL/lnA +,The detection limit of the K+ sensor is at 1.6×10-5mol /Land at 2.5×10-5mol/L K+ respectively.

关 键 词：微电极 钾 缬氨霉素 液膜型 离子选择电极 

分 类 号：O657.15[理学—分析化学]