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. 2012 Apr;12(4):315–326. doi: 10.1089/ast.2011.0754

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Copyright 2012, Mary Ann Liebert, Inc.

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FIG. 2. — The raw time-of-flight (ToF) mass spectrum is fit to quantify the ion contributions to the signal. The fitting algorithm determines the peak area to quantify the contribution from each ion and derive the elemental analysis (Aiken et al., 2008). The comparison between the raw data and the total fit provide an indication of the goodness of fit. For m/z 27, the photochemical aerosol arising from a 0.1% CH₄/99.9% N₂ atmosphere shows peaks at m/z values of 27.011 and 27.023 which are most likely due to ions HCN⁺ and , respectively. A.U., arbitrary units.

Inline graphic — The raw time-of-flight (ToF) mass spectrum is fit to quantify the ion contributions to the signal. The fitting algorithm determines the peak area to quantify the contribution from each ion and derive the elemental analysis (Aiken et al., 2008). The comparison between the raw data and the total fit provide an indication of the goodness of fit. For m/z 27, the photochemical aerosol arising from a 0.1% CH₄/99.9% N₂ atmosphere shows peaks at m/z values of 27.011 and 27.023 which are most likely due to ions HCN⁺ and , respectively. A.U., arbitrary units.