A SIMPLE METHOD FOR ESTIMATING EFFECTIVE ION-SOURCE RESIDENCE TIME

被引：4

作者：

GRIFFITH, KS ^{[1
]}

GELLENE, GI ^{[1
]}

机构：

[1] TEXAS TECH UNIV,DEPT CHEM & BIOCHEM,LUBBOCK,TX 79409

来源：

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY | 1993年 / 4卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/1044-0305(93)80036-X

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A method is presented that uses the well-understood O2/Ar ion-molecule reaction system to determine the effective ion source residence time of a chemical ionization source. The process consists of: (1) defining the kinetic system in terms of reactions, reaction rates, and ionization cross sections; (2) solving the differential equations that describe the time evolution of the kinetic system, and (3) comparing the calculated results to experimentally measured relative ion intensities. These steps are repeated for a variety of O2/Ar sample ratios and inlet pressures. The method leads to a simple relationship between inlet pressure and effective ion source residence time, independent of the O2/Ar sample ratio.

引用

页码：787 / 791

页数：5

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