A NEW INSTRUMENT FOR SPATIALLY-RESOLVED LASER-DESORPTION LASER MULTIPHOTON IONIZATION MASS-SPECTROMETRY

被引：22
|
作者：
VOUMARD, P
ZHAN, Q
ZENOBI, R
机构：
[1] LPAS, Ecole Polytechnique Fédérale
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1993年 / 64卷 / 08期
关键词：
D O I：
10.1063/1.1143963
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A new reflectron time-of-flight mass spectrometer using a pulsed CO2 laser for desorption of neutral molecules, followed by a pulsed, tunable UV laser for resonant multiphoton postionization is described. The innovative features of this instrument are the following: spatially resolved desorption in the mum range, a simple and efficient ion extraction geometry, and several improvements in sample loading, positioning, and observation. Excellent sensitivity in the attomole range and a mass resolution of M/DELTAM almost-equal-to 2000 are demonstrated. Primary applications include spatially resolved organic trace analysis and the detection of selected chemical compounds in complex mixtures.
引用
收藏
页码：2215 / 2220
页数：6
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