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A New Nitric Oxide Gas Sensor Based on Reticulated Vitreous Carbon/Nafion and Its Applications
Author(s) -
Sun Jie,
Hauser Peter C.,
Zhelyaskov Valentine,
Lin Jie,
Broderick Mark,
Fein Harry,
Zhang Xueji
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302987
Subject(s) - nafion , electrode , oxide , detection limit , nitric acid , fabrication , materials science , analytical chemistry (journal) , carbon fibers , nitric oxide , electrochemical gas sensor , electrochemistry , chemistry , chemical engineering , inorganic chemistry , chromatography , composite material , organic chemistry , metallurgy , medicine , alternative medicine , pathology , engineering , composite number
Reticulated vitreous carbon (RVC), and Nafion membrane are used to fabricate a composition electrode to measure nitric oxide (NO) concentration amperometrically in the gas phase. Limit of detection was found to be 6 ppb at an applied voltage of 0.66 V (vs. mercury sulfate reference electrode) with average response time of less than 30 seconds. The response of the sensor was linearly dependent on the concentration over the whole tested range from 19 ppb‐50 ppm of NO. Simplicity in electrode fabrication and consistent performance between individual sensors make RVC and Nafion attractive materials for detecting very low levels of nitric oxide gas in routine analysis.