PHOTOLYTIC NITROGEN DIOXIDE CONVERTER AND METHOD USING THE PHOTOLYTIC NITROGEN DIOXIDE CONVERTER

摘要

A solid-state light source photolytic NOSUB2 /SUBconverter including a reaction chamber made of a reflective material with diffuse reflective properties, whereby the reaction chamber includes a low volume gas cell wherein the gas sample residence time is less than 5 seconds is provided. The NOSUB2 /SUBin the air sample is exposed to ultraviolet radiation at wavelengths less than 420 nm, whereby the NOSUB2 /SUBis converted to NO. The NO is subsequently measured using an NO analyzer. The solid-state light source includes diode lasers and LED's that emit UV wavelength in the range of 350-420 nm. The use of a narrow wavelength range afforded by the solid-state light source results in an interference-free conversion of NOSUB2 /SUBto NO at high efficiency.