HR: 0830h
AN: A31D-0068    [PDF]
TI: Comparison of the NIST Ozone, Nitric Oxide and Nitrogen Dioxide Standards
AU: Cohen, R C
EM: cohen@cchem.berkeley.edu
AF: Department of Chemistry; University of California, Berkeley, 419 Latimer Hall, Berkeley, CA 94720 United States
AU: Cohen, R C
EM: cohen@cchem.berkeley.edu
AF: Department of Earth and Planetary Science; University of California, Berkeley, McCone Hall, Berkeley, CA 94720 United States
AU: * Bertram, T H
EM: tbertram@uclink.berkeley.edu
AF: Department of Chemistry; University of California, Berkeley, 419 Latimer Hall, Berkeley, CA 94720 United States
AU: Chu, P M
EM: pamela.chu@nist.gov
AF: Gas Metrology and Classical Methods Group; National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Md 20899 United States
AB: Comparison of the NIST primary nitrogen dioxide (NO$_{2}$), nitric oxide (NO) and ozone (O$_{3}$) standards were conducted using gas-phase titration of ozone with nitric oxide. NO, NO$_{2}$ and O$_{3}$ were monitored {\it in situ} using chemiluminescence detection (CD), laser induced fluorescence (LIF) and UV photometry, respectively. The observed correlation between the chemical loss of NO and O$_{3}$ and formation of NO$_{2}$ during titration experiments was within 1% at tropospherically relevant mixing ratios (40-200 ppbv) indicating that NIST O$_{3}$, NO and NO$_{2}$ standards are accurate to within 1%. Prospects for improving on these experiments are discussed.
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting