DIRECT DETERMINATION OF TRACE-METALS IN SOLID SAMPLES BY ATOMIC-ABSORPTION SPECTROMETRY WITH ELECTROTHERMAL ATOMIZERS .2. DETERMINATION OF LEAD IN STEELS AND NICKEL-BASE ALLOYS

被引:32
作者
LUNDBERG, E
FRECH, W
机构
关键词
D O I
10.1016/S0003-2670(01)83816-2
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The application of the solid sampling technique to the determination of lead in metallurgical samples is described. Comparison of non-isothermal and isothermal atomization, optimization of the atomization temperature, comparison of peak-height and peak-area measurements, and methods of extending the working range are reported. A method for the direct determination of lead in high- and low-alloy steels and in nickel-base alloys has been developed. The solid samples containing 0.2-60 μg Pb g-1, are inserted into a Varian-Techtron CRA90 graphite cup held at constant temperature (1800°C). Concentrations are calculated from the integrated peak absorbances obtained for samples and arbitrary metallurgical standards. Good agreement with certified values was obtained for all materials investigated, with a typical relative standard deviation of 7%. © 1979.
引用
收藏
页码:75 / 84
页数:10
相关论文
共 11 条