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nondispersive infrared
The fluxes of carbon dioxide were determined at the water-air interface using floating chambers connected to an automated nondispersive infrared instrument (NDIR) or a Fourier transform infrared instrument (FTIR).
      
Microdetermination of oxygen in organic compounds using a glassy carbon pyrolysis tube and nondispersive infrared detection
      
Gas concentrations were measured using an nondispersive infrared (gas filter correlation/infra-red) analyzer and a chemiluminescence-based analyzer, respectively.
      
The physical principle employed in many capnometers is nondispersive infrared absorption: An infrared light beam is projected through a gas sample and the intensity of transmitted light is measured.
      
A nondispersive infrared monitor was also used for CO analysis.
      
Paramagnetic method was employed for O2 measurements and the nondispersive infrared technique was used for measuring the amounts of CO, CO2 and N2O.
      
 

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