Observations of APAN during TexAQS 2000

James M. Roberts, Frank Flocke, Andrew Weinheimer, Hiroshi Tanimoto, Bertram T. Jobson, Daniel Riemer, Eric Apel, Elliot Atlas, Stephen Donnelly, Verity Stroud, Kristen Johnson, Rachel Weaver, Fredrick C. Fehsenfeld

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Measurements of peroxycarboxylic nitric anhydrides (PANs) made in Houston, Texas during TexAQS (Texas Air Quality Study) 2000 showed a relatively abundant PAN compound that had not been identified in previous studies in North America [cf. Williams et al., 2000]. This compound was hypothesized to be peroxyacrylic nitric anhydride { CH2=CHC(O)OONO2, APAN} based on the work of Tanimoto and Akimoto, [2001]. APAN was synthesized and characterized on one of the two GC systems used to make those measurements, subsequent to the TexAQS 2000 field study, confirming that APAN was observed during TexAQS 2000, both on the ground and in airborne measurements. Mixing ratios of APAN were estimated from the response of the system to PAN and PPN and ranged up to 502 pptv, which was 30% of PAN. High APAN values were associated with the precursor species 1,3-butadiene and acrolein, which had local petrochemical sources. The presence of APAN at these unprecedented levels demonstrates the impact of these reactive VOC species, and may have associated health effects.

Original languageEnglish (US)
Pages (from-to)4195-4198
Number of pages4
JournalGeophysical Research Letters
Issue number22
StatePublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)


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