... doi:10.1021/la061187w ´ ` 18 O Casals, A Romano-Rodrıguez, X Illa, C Zamani, A Vila, ` ´ J.R Morante, I Gracia, P Ivanov, N Sabate, L Fonseca, ´ J Santander, E Figueras, C Cane, Micro and nanotechnologies ... dimethacrylate coated onto a fused silica capillary, and is suitable for analyzing hydrocarbons (natural gas, refinery gas, C1–C7, all C1–C3 isomers except propylene and propane); CO2, methane, air/CO, ... s Analysis time Variable (Max 600 s) Variable (Max 600 s) Column pressure Fig Chromatogram of a synthetic air, and b TMA (presenting peaks of air and TMA) analyzed in ‘‘Plot A ’ In chromatogram...