ELECTROTHERMAL VAPORIZATION SAMPLE INTRODUCTION SYSTEM FOR THE ANALYSIS OF PELLETIZED SOLIDS BY INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION-SPECTROMETRY

被引:40
作者
KARANASSIOS, V [1 ]
REN, JM [1 ]
SALIN, ED [1 ]
机构
[1] MCGILL UNIV,DEPT CHEM,801 SHERBROOKE ST W,MONTREAL H3A 2K6,QUEBEC,CANADA
关键词
ELECTROTHERMAL VAPORIZATION; SAMPLE INTRODUCTION; INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION SPECTROMETRY; POWDERS; SOLIDS ANALYSIS;
D O I
10.1039/ja9910600527
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A new approach for solid sample introduction into a furnace for use with an inductively coupled plasma has been developed and tested with atomic emission spectrometry. A powdered sample is mixed with graphite and pressed into a pellet. The pellet is placed between the electrodes of a modified electrothermal vaporization device. A current causes rapid ohmic heating of the pellet and results in analyte vaporization. The vapour is swept into the plasma by an Ar carrier gas stream. In this preliminary report, system characterization with single element oxide standards and testing with powdered botanical samples are described. The system shows considerable promise for rapid screening of botanical samples of environmental concern. Detection limits for Cd, Zn and Pb of 1, 3 and 0.6 ppb (300, 800 and 150 pg) were obtained using the oxide standards.
引用
收藏
页码:527 / 533
页数:7
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