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. 2019 Dec 9;14(12):e0226012. doi: 10.1371/journal.pone.0226012

Fig 1. Dependence of average spectrum on the number of laser shots.

Fig 1

A) Processed spectra for the reference sample RS2 acquired on the SimulTOF100 are shown in the mass range from 5.53 kDa to 6.55 kDa for 8K, 400K, 4 million, and 100 million laser shots. B) Comparison of average spectra for the reference sample RS2 acquired on the SimulTOF100 in the m/z-range 8.1 to 8.8 kDa. Orange: 0.4 million laser shots, Black: 8 million laser shots. Top panel: The whole intensity range; Bottom panel: Enlarged to show low-intensity peaks. The dashed vertical lines indicate the m/z position of small peaks discussed in the text.