ELECTROSPRAY MASS-SPECTROMETRY OF POLY(ETHYLENE GLYCOLS) WITH MOLECULAR-WEIGHTS UP TO 5 MILLION

被引：178

作者：

NOHMI, T ^{[1
]}

FENN, JB ^{[1
]}

机构：

[1] YALE UNIV,DEPT CHEM ENGN,NEW HAVEN,CT 06520

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1992年 / 114卷 / 09期

关键词：

D O I：

10.1021/ja00035a012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mass analysis has been carried out on ions formed in an electrospray (ES) ion source from poly(ethylene glycols) (PEGs) with molecular weights (Ms) ranging from 200 to 5 000 000. The number of charges per unit length of oligomer decreases with increasing molecular weight (M) in the range below M = 20000. Above that value the number increases until at M = 5 000 000 it slightly exceeds the maximum allowed by the electrostatic model previously proposed. This behavior can be understood in terms of the solution properties of PEG and the two mechanisms that have been proposed for the formation of ions from charged droplets.

引用

页码：3241 / 3246

页数：6

共 19 条

[1]

Bailey F. E., 1959, J APPL POLYM SCI, V1, P56, DOI DOI 10.1002/APP.]959.070010110

[2]

BAILEY FE, 1976, POLY ETHYLENE OXIDE, P31

[3] MOLECULAR BEAMS OF MACROIONS [J].