Comparison of annular denuder and filter pack collection of HNO3 (g), HNO2((g), SO2 (g), and particulate-phase nitrate, nitrite and sulfate in the south-west desert

The Contribution of Sulfate and Nitrate to Atmospheric Fine Particles During Winter Inversion Fogs in Cache Valley, Utah

“…The values in Table 3 suggest limits of detection of about 2 nmole/m 3 . Benner et al 23 have reported on the limits of detection and the precision of gas-phase and particulate-phase nitrogen species collected by the annular diffusion denuder sampler. The limit of detection for HNO 3 Table 3.…”

Fine Particulate Chemical Composition and Light Extinction at Meadview, AZ

“…Quartz filters were heated to 800°C at a nominal rate of 20°C/min to determine as CO 2 Intensive Program using a University Research Glass annular diffusion denuder sampling system. 5,18 Two carbonate/glycerine coated annular denuder sections were used. Data from the second section was used to calculate the collection efficiency of SO 2 (g) and to correct for the any interference from NO 2 (g) for each sampling period.…”

Semi-Volatile Species in PM2.5: Comparison of Integrated and Continuous Samplers for PM2.5Research or Monitoring

“…Some of the collected particulate NH 4 NO 3 discomposes to gaseous HNO 3 and NH 3 and is lost from the collected particles, due to temperature and humidity changes during sampling and the pressure drop across the filter. Annular denuder samplers, 28,29 such as the ChemSpec, are commonly used to accurately determine particulate inorganic compounds including semivolatile NH 4 NO 3 . The ChemSpec results were used as the reference concentration for particulate NO 3 -to compare with the BOSS samplers for 24-hr collection time periods (see Table 1).…”