A comparison was made of five optical spectrographic methods for the analysis of high-purity zinc. Analytical capability was required for the determination of Ag, Al, Cd, Cu, Fe, Hg, Mg, Pb, and Sn in the range from 1 to 100 ppm. The factors considered were: sensitivity of detection, handling ease, possible sources of contamination, analysis time, and precision and accuracy. The data show that a metal-direct arcing procedure is rapid, has high sensitivity of detection, and requires a minimum of sample handling. Solution-residue dc arc, point-to-plane ignited ac arc, and zinc oxide dc-arc procedures gave better reproducibility, but lacked the required sensitivity of detection.
Get full access to this article
View all access options for this article.
References
1.
British Standards Institution, London, B. S. 1005 (1942), Amendment No. 1, (1962); Anal. Abstr.10, 1728 (1963).
2.
ASTM Comm. E-2, Methods for Emission Spectrochemical Analysis, (American Society for Testing and Materials, Philadelphia, Pa., 1964), 4th Ed., pp. 347–351.
