CONTINUOUS-FLOW DILUTION FOR FLAME ATOMIC-ABSORPTION SPECTROMETRY USING A VARIABLE VOLUME DILUTION CHAMBER AND PEAK AREA MEASUREMENT

被引:21
作者
BEINROHR, E [1 ]
CSEMI, P [1 ]
TYSON, JF [1 ]
机构
[1] UNIV MASSACHUSETTS, DEPT CHEM, LEDERLE GRAD RES TOWER A, AMHERST, MA 01003 USA
关键词
FLOW INJECTION; CONTINUOUS FLOW DILUTION; VARIABLE VOLUME DILUTION CHAMBER; FLAME ATOMIC ABSORPTION SPECTROMETRY; EXTENSION OF LINEAR DYNAMIC RANGE;
D O I
10.1039/ja9910600307
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A simple procedure, based on flow injection, to extend the dynamic range of flame atomic absorption spectrometry (FAAS) has been investigated. The continuous dilution system consists of a sample injector for sample volumes of 15-1000-mu-l and a variable volume (0.1-10 ml) dilution chamber. Peak area measurement of the transient signal allowed the use of a simple standard solution for calibration and quantification. The linear dynamic range of FAAS can be enhanced by 2-3 orders of magnitude; for copper a concentration range of from about 0.1 to 9 x 10(3)-mu-g ml-1 is achieved. The reproducibility of the measurements is 2-4%.
引用
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页码:307 / 311
页数:5
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