Premium
Effect of Damping Mechanisms on Mass Calibration Equation for MALDI/FTMS
Author(s) -
Yue Su,
HaoYang Wang,
YinLong Guo,
BingRen Xiang,
DengKui An
Publication year - 2005
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200591053
Subject(s) - chemistry , ion , calibration , fourier transform ion cyclotron resonance , mass spectrometry , atomic physics , fourier transform , analytical chemistry (journal) , physics , quantum mechanics , chromatography , organic chemistry
Collisional damping affects the relationship between ion mass and effective cyclotron frequency in Fourier transform mass spectrometry. The exact mass calibration equationwas therefore derived from the characteristic equation of system model, force $ = m{{{\rm d}v} \over {{\rm d}t}} = qE-qv \times B_{0} - \xi v$ (ξ v , a frictional damping force), in which k is amended by the shift of observed frequency of matrix ion or other known ion in external calibration. The mass obtained by the amended calibration equation is therefore immune to collisional damping and space‐charge effects on mass accuracy. The relative errors of ion mass measured were all less than 2×10 ‐6 .