FT-IR OM, OC, EC and functional groups

The Air Quality Research Center is conducting an ongoing research program to develop FT-IR (Fourier transform-infrared spectroscopy) methods to measure functional groups, organic matter (OM), organic carbon (OC) and elemental carbon (EC) in particles collected on Teflon© filters.  Direct measurement of OM is useful because current methods require using an estimated organic mass/organic carbon ratio—OM/OC—to convert measured OC to OM.