CONTINUOUS-FLOW MICROWAVE-ASSISTED DIGESTION OF ENVIRONMENTAL-SAMPLES USING ATOMIC SPECTROMETRIC DETECTION

被引:35
作者
STURGEON, RE [1 ]
WILLIE, SN [1 ]
METHVEN, BA [1 ]
LAM, JWH [1 ]
MATUSIEWICZ, H [1 ]
机构
[1] POLITECHN POZNANSKA,DEPT ANALYT CHEM,PL-60695 POZNAN,POLAND
关键词
CONTINUOUS-FLOW MICROWAVE DIGESTION; ELEMENTAL ANALYSIS; SLURRY SAMPLE; RESIDUAL CARBON; DIGESTION EFFICIENCY; CERTIFIED REFERENCE MATERIALS; ATOMIC SPECTROMETRIC DETECTION;
D O I
10.1039/ja9951000981
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A continuous-flow microwave-assisted digestion technique was tested with a view to the evaluation of its effectiveness for decomposition of environmental samples. A CEM SpectroPrep system was used at moderate powers and pressures of up to 2413 kPa to perform on-line digestion of slurried samples of biological tissues (0.5% m/v) and marine sediment (1% m/v), The efficiency of oxidation of biological matrices, as characterized by the residual carbon content of the solutions, was 64%. Recovery;of trace elements averaged 90+/-1% and was accommodated with the use of suitable internal standards. Accuracy was verified by analysis of certified reference materials from the National Research Council of Canada, marine sediment BCSS-1 and lobster hepatopancreas tissue LUTS-1. Precision of measurement, as reflected in the; determination of the trace metal content in replicate solutions, using a variety of atomic spectrometric techniques, was better than 1% RSD (relative standard deviation).
引用
收藏
页码:981 / 986
页数:6
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