A RYDBERG-ATOM IONIZATION SOURCE FOR NEGATIVE-ION MASS-SPECTROMETRY

被引：0
|
作者：
NAGATA, T
KONDOW, T
YAMAMOTO, Y
HAMAKAWA, S
AZAMI, K
机构：
[1] UNIV TOKYO,FAC SCI,DEPT CHEM,BUNKYO KU,TOKYO 113,JAPAN
[2] NIPPON OIL CO LTD,CENT TECH RES LAB,NAKA KU,YOKOHAMA 231,JAPAN
来源：
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1993年 / 123卷 / 03期
关键词：
RYDBERG-ATOM IONIZATION; NEGATIVE ION MASS SPECTROMETRY; 1-DECANETHIOL; 3-NITROBENZYL-ALCOHOL; O-NITROPHENYL OCTYL ETHER;
D O I：
10.1016/0168-1176(93)87100-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
An ion source for negative ion mass spectrometry has been developed. The ionization method is based on the collisional electron transfer from a high-Rydberg atom (A**) to a target molecule which possesses a positive electron affinity. In this ionization process, negative ions are directly produced via resonance capture of the ''quasi-free'' Rydberg electrons: A** + M --> A+ + M-. In contrast to negative chemical ionization, the Rydberg-atom ionization proceeds at a low pressure of almost-equal-to 10(-3) Pa. The method was applied to several molecular systems, such as 1-decanethiol, 3-nitrobenzyl alcohol and o-nitrophenyl octyl ether.
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页码：217 / 223
页数：7
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