An electrode for use in a electrochemical sensor comprises carbon modified with a chemically sensitive redox-active compound, excluding an electrode based on carbon having derivatized thereon two redox-active species wherein at least one of said species is selected from anthraquinone, phenanthrenequinone and N,N′-diphenyl-p-phenylenediamine (DPPD). The invention further provides a pH sensor comprising:
a working electrode comprising carbon modified with a chemically sensitive redox active material; and
a counter electrode,
wherein the ratio of the surface area of the working electrode to the surface area of the counter electrode is from 1:10 to 10:1. Also provided is a pH sensor comprising:
a working electrode comprising carbon modified with a chemically sensitive redox active material, and
a counter electrode,
wherein the area of the working electrode is from 500 μm2 to 0.1 m2. The uses of these electrodes and sensors are also described.
一种用于电
化学传感器的电极包括用
化学敏感的氧化还原活性化合物修饰的碳,不包括基于碳的电极,该电极上衍生有两种氧化还原活性物质,其中至少一种所述物质选自
蒽醌、
菲蒽醌和N,N′-二苯基
对苯二胺(
DPPD)。本发明进一步提供了一种 pH 传感器,包括
工作电极,由用
化学敏感氧化还原活性材料修饰的碳组成;以及
一个对电极、
其中工作电极的表面积与对电极的表面积之比为 1:10 至 10:1。还提供了一种 pH 传感器,包括
工作电极,包括用
化学敏感氧化还原活性材料修饰的碳,以及
一个对电极、
其中工作电极的面积为 500 μm2 至 0.1 m2。此外,还介绍了这些电极和传感器的用途。