A New Nitric Oxide Gas Sensor Based on Reticulated Vitreous Carbon/Nafion and Its Applications

Abstract

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.

Physiologically Relevant Measurements of Nitric Oxide in Cardiovascular Research Using Electrochemical Microsensors

“…A reticulated vitreous carbon and Nafion membrane-covered electrode, constructed for measurement in the gas phase, was reported to detect NO at 6 ppb [39]. …”

Electrochemical study of S–nitrosoglutathione and nitric oxide by carbon fibre NO sensor and cyclic voltammetry – possible way of monitoring of nitric oxide

“…Recently, the simple apparatus consisting from carbon fibre electrode [75][76][77] and ion selective membrane [78] was developed for a determination of NO. The ion selective membrane enables nitric oxide to permeate it only [79,80]. The instruments is calibrated by S-nitroso-Nacetyl-D,L-penicillamine (SNAP) using copper as a catalyst [52].…”

Synthesis of Graphene Supported Pd Nanoparticles for Amperometric NO Gas Sensors

“…Extended inhalation of high concentration of nitric oxide can lead to hypotension, sepsis, hemorrhage and other adverse conditions. [1] In addition, nitric oxide gas can be oxidized in the air into nitrogen dioxide, which can be toxic to lung tissue and is a major contributor for ground-level ozone formation. Continued measurement of nitric oxide may also be necessary to make sure air nitric oxide level is below the limit set by United State Occupational Safety and Health Administration (25 ppm/8 hours) in high risk areas.…”

“…Blurton and Sedlak explored Teflon-bond gold electrode to detect nitric oxide. Sun, et al [1] have reported that employing reticulated vitreous carbon as electrode active material has achieved high Electrocatalytic properties. Do, et al [3] used the sensor array for monitoring gas mixtures such as NOx, CO, O 2 and SO 2 .…”