DESIGN AND CALIBRATION OF AN ELECTROSTATIC ENERGY ANALYZER TIME-OF-FLIGHT MASS-SPECTROMETER FOR MEASUREMENT OF LASER-DESORBED ION KINETIC ENERGIES

被引：4
|
作者：
KINSEL, GR
RUSSELL, DH
机构：
[1] TEXAS A&M UNIV, DEPT CHEM, BIOL MASS SPECT LAB, COLLEGE STN, TX 77843 USA
[2] UNIV TEXAS, DEPT CHEM & BIOCHEM, ARLINGTON, TX USA
来源：
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY | 1995年 / 6卷 / 08期
关键词：
D O I：
10.1016/1044-0305(95)00262-C
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
The design of a hybrid electrostatic energy analyzer-time-of-flight mass spectrometer for measurement of ion kinetic energies produced by laser desorption ionization is presented. The need for experimental evaluation of the calibration and performance of the instrument is discussed and a novel laser multiphoton ionization technique, which allows experimental calibration of the energy bandpass of the electrostatic energy analyzer, is described. Laser multiphoton ionization at varying electric field strengths also allows the effects of electric field distortions on energy resolution of the instrument to be probed. Measurement of the translational energies of ions produced by 266-nm laser desorption ionization at 48 mJ/cm(2) of material adsorbed to a stainless steel probe by using this instrument also is presented. Ion translational energies of +19 +/- 5, +10 +/- 5, and +10 +/- 5 eV are found for adsorbed Na+, K+, and m-xylene M(+), respectively.
引用
收藏
页码：619 / 626
页数：8
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