BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ZContent.net//ZapCalLib 1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
SUMMARY:Using Stable Isotopes to Measure Indoor Surface Reservoirs
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20240918T160000
UID:2026-05-19-19-41-21@natsci.colostate.edu
DTSTAMP:20260519T194121
Description:About the Seminar:\n\nHumans spend most of their time indoors\,
  yet little consideration is made about indoor health exposures. Previous 
 studies focused on gas phase contaminants\, but surfaces like drywall\, ca
 rpet\, glass\, etc. play a unique role since different reactions occur on 
 surfaces versus the gas phase\, which lead to new contaminants. Surfaces a
 lso act as a major source for known indoor gas phase compounds. Little is 
 known about how different surfaces contribute as a source and the location
  of these compounds in surface reservoirs. Studies show surfaces behave di
 fferently\, and models show that diffusion likely occurs into the bulk for
  many gas-surface interactions. However\, no direct measurements have been
  made. Using stable isotopes as a tracer\, I can obtain direct measurement
 s of gas-phase compounds for different surfaces and the inner bulk materia
 l. Several ecological studies have established the use of stable isotopes 
 since the 1990s to understand complex systems. This would be the first tim
 e applying these stable isotope methods to an indoor environment. An Isoto
 pe Ratio Mass Spectrometer (IRMS) can quantify the amount of the isotope t
 racer in each surface and bulk layer measured. The Direct Analysis in Real
  Time Mass Spectrometer (DART-MS)\, which has been established for indoor 
 glass surfaces\, will supplement the IRMS by giving qualitative data on th
 e oxidation products of each surface. By using both instruments\, I will h
 ave direct measurements of where gases interact on surfaces and the produc
 ts created. These measurements will help understand and model the role sur
 faces have indoors. 4:00 pm
END:VEVENT
END:VCALENDAR