INFLUENCE OF THE LASER-BEAM DIRECTION ON THE MOLECULAR ION EJECTION ANGLE IN MATRIX-ASSISTED LASER-DESORPTION IONIZATION

被引：18

作者：

AKSOUH, F

CHAURAND, P

DEPRUN, C

DELLANEGRA, S

HOYES, J

LEBEYEC, Y

PINHO, RR

机构：

[1] INST PHYS NUCL LYON, CNRS, IN2P3, F-91406 ORSAY, FRANCE

[2] FISONS VG ANALYT, MANCHESTER, LANCS, ENGLAND

[3] PUC, RIO DE JANEIRO, BRAZIL

来源：

RAPID COMMUNICATIONS IN MASS SPECTROMETRY | 1995年 / 9卷 / 06期

关键词：

D O I：

10.1002/rcm.1290090609

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Angular intensity distribution of molecular ions ejected in matrix-assisted laser desorption/ionization (MALDI) have been measured for two symmetrical positions of the laser beam with respect to the sample surface normal (+60 degrees and -60 degrees). It is shown that the molecular ions are ejected in the direction opposite to the incident laser beam with an average angle of similar to 30 degrees which does not depend on the molecular weight in the mass range m/z = 1000 to 25 000. Experiments were performed with the matrix alpha-cyano4-hydroxy-cinnamic acid.

引用

页码：515 / 518

页数：4

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