SECONDARY-ELECTRON ANALYSIS OF POLYMERIC IONS GENERATED BY AN ELECTROSPRAY ION-SOURCE

被引：20

作者：

XU, Y ^{[1
]}

BAE, YK ^{[1
]}

BEUHLER, RJ ^{[1
]}

FRIEDMAN, L ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 46期

关键词：

D O I：

10.1021/j100148a008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electrospray mass spectra of biopolymeric ions can be used to determine ion masses using secondary electron pulse spectra. Secondary electron yields reflect electronic excitation deposited in a solid target, which is related to the electron density and velocity of projectile ions. Secondary electron pulse spectra provide a fingerprint which measures masses of ions of known velocity. Ions with masses from 411 (tetraheptylammonium ion) to 480 000 (apoferritin) amu give secondary electron yields that fall on a single curve of secondary electrons/amu plotted as a function of ion velocity. Secondary electron analysis revealed decomposition of larger polyethylene glycol ions (m > 10 000 amu).

引用

页码：11883 / 11886

页数：4

共 5 条

[1] MODEL OF SECONDARY-ELECTRON YIELDS FROM ATOMIC AND POLYATOMIC ION IMPACTS ON COPPER AND TUNGSTEN SURFACES BASED UPON STOPPING-POWER CALCULATIONS [J].