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Table 1 Mass Measurement Error. Standard deviation (S N ) observed for the trytpic autolysis peaks 842.508 and 2211.1. Raw data; TPS – Thin-Plate Spline (TPS) calibrated data; TPS-MST – The data, which undergone Thin-Plate Spline (TPS)(pre-processing), followed by Maximum Spanning Tree (MST) calibration

From: Calibration of mass spectrometric peptide mass fingerprint data without specific external or internal calibrants

Calibration Mass S N [Da] S N [ppm]
Raw data 842.508 0.1 118
Raw data 2211.1 0.3 135
TPS 842.508 0.03 37
TPS 2211.1 0.057 26
TPS-MST 842.508 0.012 14.5
TPS-MST 2211.1 0.01 4.6