Improved analyzer for nitrogen dioxide by laser-induced fluorescence technique

Jun Matsumoto, Yoshizumi Kajii

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A compact, fast-response instrument for measuring atmospheric NO 2 by single-wavelength excitation laser-induced fluorescence (LIF) technique was improved. A single-pass alignment of a more powerful, pulsed laser was utilized to realize the pptv (=10-12 by volume) of the limit of detection (LOD). As a result, the LOD reached 1.8pptv for 1-min averaging (S/N=1). To determine the instrumental zero accurately, interference by particles was cancelled out utilizing an NO2 scrubber tube coated with a mixture of titanium dioxide (TiO2) and hydroxyapatite. Consequently, it was confirmed that the combination of the improved single-wavelength LIF instrument with the scrubber was reasonable for measuring atmospheric NO2.

Original languageEnglish
Pages (from-to)4847-4851
Number of pages5
JournalAtmospheric Environment
Volume37
Issue number34
DOIs
Publication statusPublished - 2003 Nov
Externally publishedYes

Keywords

  • Diffusion scrubber
  • Diode-pumped solid-state laser
  • Interference by particles
  • Single-pass alignment
  • Single-wavelength excitation LIF

ASJC Scopus subject areas

  • Environmental Science(all)
  • Atmospheric Science

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