EASILY IONIZABLE ELEMENT INTERFERENCES IN INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROSCOPY .1. EFFECT ON RADIAL ANALYTE EMISSION PATTERNS

被引：52

作者：

GALLEY, PJ ^{[1
]}

GLICK, M ^{[1
]}

HIEFTJE, GM ^{[1
]}

机构：

[1] INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 1993年 / 48卷 / 6-7期

关键词：

D O I：

10.1016/0584-8547(93)80084-8

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The spatial emission patterns of Ca I and Ca II in an inductively coupled plasma (ICP) arc altered when an easily ionizable element (EIE) is added to a sample solution. As a result, unanticipated interferences can arise in ICP-AES when EIEs of unknown identity or concentration are present. The EIE effect was investigated here by two-dimensional lateral mapping of Ca atomic and ionic emission by means of a monochromatic imaging spectrometer. Lithium served as the EIE at added concentrations from 0 to 1000 mug/ml. The resulting Ca radial emission images, calculated by Abel inversion, displayed in most regions a linear change in intensity with Li concentration. In regions of highest calcium emission, however, the EIE influence on Ca emission signal becomes markedly non-linear and is better fit with a logarithmic function. Principal-component and regression analysis of these EIE-altered images offers some insight into possible mechanisms of the EIE effect.

引用

页码：769 / 788

页数：20

共 34 条

[1] SPATIAL-DISTRIBUTION OF VACUUM ULTRAVIOLET-RADIATION IN AN INDUCTIVELY COUPLED PLASMA [J].