Accuracy considerations of portable electrochemical NOX analyzers
- Energy Efficiency Systems, Westbury, NY (United States)
- City Technology Ltd., Portsmouth (United Kingdom)
Two key components contributing to measurement errors of electrochemical analyzers are discussed. These are the sample conditioning system and the electrochemical nitric oxide and nitrogen dioxide sensors. The problems associated with various types of conditioning systems are discussed and some experimental results are presented using analyte spiking methods. Permeation drier based systems are shown to cause the smallest loss of the analyte. Two major problems of the NO and NO{sub 2} sensors are examined. The first problem deals with the significant effect of temperature on the sensor and its associated interference rejection filter. The requirement for maintaining sensor and filter temperature below 30{degree}C is demonstrated. The second deals with the saturation and drift considerations caused by over exposure to the gas, The significance of capillary size to minimize drift for diffusion sensors is discussed. Experimental results are presented and discussed with a view to the recently published EPA CTM-022 Method. 2 refs., 7 figs.
- OSTI ID:
- 617670
- Report Number(s):
- CONF-9605175-; TRN: 98:002112-0053
- Resource Relation:
- Conference: International symposium on measurement of toxic and related air pollutants, Research Triangle Park, NC (United States), 7-10 May 1996; Other Information: PBD: 1996; Related Information: Is Part Of Measurement of toxic and related air pollutants; PB: 889 p.
- Country of Publication:
- United States
- Language:
- English
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