Owlstone Nanotechnology 1 article published in JoVE Chemistry Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry Christopher P. Ireland1, Michael Coto1, Lauren Brown2, Russell Paris2, Caterina Ducati1 1Department of Materials Science and Metallurgy, University of Cambridge, 2Owlstone Nanotechnology A protocol for determining the effectiveness of photocatalysts in degrading indoor air concentration (ppb) model volatile organic carbons such as 2-propanol is described.