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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