MicroITIES detection of nitrate by facilitated ion transfer
MicroITIES detection of nitrate by facilitated ion transfer
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DOI：
10.1021/ac000806h
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发表时间：
2001-02-01
影响因子：
7.4
通讯作者：
Girault, HH
中科院分区：
文献类型：
--
作者：
Qian, QS;Wilson, GS;Girault, HH
通过激光光烧蚀 12 微米聚酯薄膜创建的 microITIES 阵列用于研究两种不混溶电解质溶液之间的电辅助阴离子转移。除了直接测量硝酸盐向有机相的转移之外，还测量了通过促进阴离子（抗衡离子）转移而增强的阳离子（K+）转移。在由三（2-氨基乙基）胺（tren）衍生的三酰胺（已知其作为硝酸盐的宿主）存在的情况下，监测了硝酸盐和钾转移的电流响应。电流响应和硝酸盐浓度之间的线性关系构成了动态范围为 0.1 至 5 mM 的阴离子传感器的基础。提出了双重促进转移机制来解释增强现象。
A microITIES array, created by laser photoablation of a 12-mum polyester film, was used to investigate electroassisted anion transfer between two immiscible electrolyte solutions. Besides measuring directly the transfer of nitrate to the organic phase, the enhancement of transfer of the cation (K+) by facilitated anion (counterion) transfer was measured as well. In the presence of a triamide derived from tris(2-aminoethyl)amine (tren), which is known to function as a host for nitrate, the current responses for both nitrate and potassium transfer were monitored. The linear relationships between the current responses and nitrate concentration formed the basis of an anion sensor with a dynamic range from 0.1 to 5 mM. A dual facilitated transfer mechanism is proposed to explain the enhancement phenomenon.