Nitric oxide isotope sensing in breath using a transportable Faraday rotation spectrometer(FRS) is reported. Sensitivity of 0.49 ppbv/Hz1/2 for 15NO and 3.59 ppbv/Hz1/2 for 14NO were achieved using a quantum cascade laser based dual-modulation FRS.
© 2013 Optical Society of America
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Supplementary Material (1)