Amperometric sensing of ethylene oxide in the gas phase

被引：17

作者：

Hodgson, AWE ^{[1
]}

Jacquinot, P ^{[1
]}

Hauser, PC ^{[1
]}

机构：

[1] Univ Basel, Dept Chem, CH-4056 Basel, Switzerland

来源：

ANALYTICAL CHEMISTRY | 2000年 / 72卷 / 10期

关键词：

D O I：

10.1021/ac991247l

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The sensing device used is based on a porous Pt electrode, which is supported on an ion-exchange membrane and directly exposed to the gas phase. Under acid conditions, ethylene oxide was found to be oxidized on the platinum oxide surface at +550 mV vs MSE, thus enabling its monitoring via the measurement of the associated current. A detection limit of 15 ppb was obtained, based on a signal-to-noise ratio of three, and a linear dynamic range was found up to 100 ppm. The effects of mass transport, humidity, and oxygen on the cell response, as well as the cross sensitivity to other organic vapors and inorganic gases are discussed.

引用

页码：2206 / 2210

页数：5

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