Abstract
The atomic fluorescence determination of cobalt and nickel in a variety of mild, alloy, high-speed and stainless steels is described. The fluorescence of cobalt and nickel at 240.7 and 232.0 nm, respectively, is excited by a dual-element electrodeless discharge lamp, the construction of which is described. An argon-separated air-acetylene flame is used. The dissolved steel sample is aspirated directly into the flame and the cobalt and nickel are read sequentially from calibration curves prepared from pure cobalt and nickel solutions containing approximately the same concentration of acids. The method is rapid, precise and accurate. Over 20 other common trace and minor metal constituents of steels do not interfere with the procedure nor does the matrix element (iron).
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