A new instrument to measure gaseous nitrous acid (HONO) in the atmosphere.

@article{Heland2001ANI,
  title={A new instrument to measure gaseous nitrous acid (HONO) in the atmosphere.},
  author={J{\"o}rg Heland and J Kleefmann and Ralf Kurtenbach and Peter Wiesen},
  journal={Environmental science & technology},
  year={2001},
  volume={35 15},
  pages={3207-12}
}
A new in situ instrument (LOPAP: long path absorption photometer) to measure gaseous nitrous acid (HONO) using wet chemical sampling and photometric detection has been developed. This instrument is aimed to overcome the known problems with current HONO measurement techniques and was designed to be a cheap, sensitive, compact, and continuouslyworking HONO monitorfor ambient air measurements in the troposphere or for measurements of higher concentrations e.g. in smog chambers, in exhaust gases… CONTINUE READING

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