Elemental and oxidized mercury in ambient air at Rocky Flats, Colorado
This is a dataset of elemental and oxidized mercury in the ambient atmosphere at latitude 39.912799 and longitude -105.188587. This is the locations of the Rocky Flats North air quality monitoring station, operated by the Colorado Department of Public Health and Environment. We collected these measurements using a dual-channel atmospheric mercury speciation instrument.
NSF, Division of Atmospheric and Geospace Sciences
NSF, Division of Atmospheric and Geospace Sciences 1700722
Collaborative Research: Refining and Testing Methods for Identifying and Quantifying Gaseous Oxidized Mercury in Air
Briefly, the instrument pulled air through a teflon-coated elutriator and particle impactor and then through a 6 m 1/4" PFA teflon tube that was heated to 120 degrees C. The air was then pulled either through a pyrolyzer that was heated to 650 degrees C, or through a series of two cation-exchange membranes. The pyrolyzer converted all mercury to elemental mercury, while the cation-exchange membranes captured oxidized mercury and only allowed elemental mercury to pass through. After passing through the membranes or pyrolyzer, the air was sampled for elemental mercury concentration by a Tekran 2537B analyzer. The difference between total mercury sampled through the pyrolyzer stream and elemental mercury sampled through the membrane stream was oxidized mercury. We measured total mercury for five minutes, then elemental mercury for five minutes, and then back again to total mercury. We calculated oxidized mercury for each ten-minute measurement set. We then averaged the measurements together for each one-hour period.
Lyman S., Gratz L., Elgiar T., 2019. Calibrated measurements of elemental and oxidized mercury with a dual channel instrument at Rocky Flats, Colorado. In preparation for submission for publication.
See README file
This work is licensed under a Creative Commons Attribution 4.0 License.
Lyman, Seth and Gratz, Lynne, "Elemental and oxidized mercury in ambient air at Rocky Flats, Colorado" (2019). Browse all Datasets. Paper 73.
FilesREADME.txt (2 kB)
HgDualChan_RFN2018_hourly.csv (19 kB)