Abstract
By the iron oxide powder-d.c.arc-spectrographic method, the concentration of beryllium in iron, steel, and high nickel alloy steel was determined in the range from 0.0002 to 0.14 per cent by the use of standard samples composed of electrolytic iron and known amounts of this element.Be II 3130.416 A was found the best out of eight spectrum lines between 2, 300 and 3, 400 A.It was found, in analysis of beryllium of the range from 0.0026 to 0.14 per cent in 6% nickel alloy steels, that the repeatability was 0.14±0.002, 0.014±0.0008 and 0.0026±0.0002 per cent in standard deviation, and the accuracy of this spectrographic method was comparable to that of the chemical method.Using the steels whose composition had been determined by the present method as the standards in the ingot spectrographic method, calibration curves of Be II 3130.416 A were obtained for an arc or spark method. The spark method was better than the high voltage a.c.arc in the limit of detection and the liner range.
