SECONDARY ION EMISSION FROM SOLUTIONS - TIME-DEPENDENCE AND SURFACE PHENOMENA

被引：15

作者：

KRIGER, MS

COOK, KD

SHORT, RT

TODD, PJ

机构：

[1] UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996

[2] OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831

来源：

ANALYTICAL CHEMISTRY | 1992年 / 64卷 / 23期

关键词：

D O I：

10.1021/ac00047a030

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The temporal behavior of FAB mass spectra from glycerol solutions of tetradecyltrimethylammonium bromide (C14H29N(CH3)3Br, TTAB) and tetraethylammonium iodide (TEAI) was investigated. FAB spectra of the TTAB solution displayed a continuous decrease in TTA+ with time. Spectra obtained from the TEAI solution were initially invariant for several minutes and then displayed a gradual increase in the relative abundance of TEA+ to a maximum, followed by a precipitous drop in ion intensity. Secondary ion images of droplets of TTAB solution showed that emission of both TTA+ and glycerol secondary ion images of droplets of TEAI solution showed heterogeneous and segregated emission of both TEA+ and protonated glycerol. Results from the FAB spectra and the secondary ion images were correlated and rationalized on the basis of surface tension induced mass transport and matrix evaporation.

引用

页码：3052 / 3058

页数：7

共 24 条

[1] SECONDARY ION MASS-SPECTROMETRY WITH CESIUM ION PRIMARY BEAM AND LIQUID TARGET MATRIX FOR ANALYSIS OF BIOORGANIC COMPOUNDS [J].