Application and Field Validation of a Continuous Nonmethane Organic Carbon Analyzer

Somenath Mitra, Chaohua Feng, Naihong Zhu, Gary McAllister

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Nonmethane organic carbon (NMOC) is a measure of total organic carbon except for that from CH4. We recently reported the development of online instrumentation for continuous NMOC monitoring. This instrument, referred to as C-NMOC, uses a microsorbent trap in combination with a gas-sampling valve as the sampling interface. A conventional oxidation/reduction NMOC detector is used for quantitation. In addition to being an online concentrator and an injector, the microtrap serves as a separator that isolates NMOC from H2O, CO, CO2, CH4, and other background gases. Therefore, the C-NMOC is able to handle high concentrations of background gases commonly found in stack emissions and has detection limits in the ppb levels. This paper reports the results of field validation and testing of a C-NMOC analyzer at a coatings facility in the eastern United States. The instrument was able to monitor the process transients in real time, based on which corrective actions could be taken. It demonstrated good accuracy, high precision, and long-term stability.

Original languageEnglish (US)
Pages (from-to)861-868
Number of pages8
JournalJournal of the Air and Waste Management Association
Issue number6
StatePublished - Jun 2001

All Science Journal Classification (ASJC) codes

  • Pollution
  • Waste Management and Disposal
  • General Environmental Science
  • Management, Monitoring, Policy and Law
  • Environmental Engineering
  • Atmospheric Science
  • Environmental Chemistry


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