A measurement of total reactive nitrogen, NOy, together with NO2, NO, and O3 via cavity ring-down spectroscopy.
Wild RJ, Edwards PM, Dub? WP, Baumann K, Edgerton ES, Quinn PK, Roberts JM, Rollins AW, Veres PR, Warneke C, Williams EJ, Yuan B, Brown SS. A measurement of total reactive nitrogen, NOy, together with NO2, NO, and O3 via cavity ring-down spectroscopy. Environ Sci Technol. 2014 Aug 19; 48(16):9609-15.