Summary of combined FTIR and DTMS results.

The relative intensity of various characteristics is indicated in five categories (-: absent, +/-: minimal, +: average, ++: strong, and +++: very strong). Organic signal = cumulative intensity of the measurement, where XH = extra High (>300 x blank measurement), H = high (300–100 x), M = medium (100–40 x), L/M = low to medium (40–20 x) and L = low (<20x blank measurement).