Abstract

Qualitative spectrographic analyses of metallic areas of less than 0.05 mm in diameter can be obtained by means of the equipment and methods described. The apparatus consists of (1) a device for holding a counter electrode and the specimen to be analyzed, (2) an electronic spark generator, and (3) a medium quartz spectrograph. Minute areas such as inclusions, segregations, crystalline phases, surface contaminations, metallic platings, and the extent of metallic diffusion have been successfully analyzed.

© 1947 Optical Society of America

The Measurement of the Intensity Ratios of Spectral Lines with Electron Multiplier Photo-Tubes

K. G. Kessler and R. A. Wolfe
J. Opt. Soc. Am. 37(3) 133-144 (1947)

Spectrochemical Analysis by the Copper Spark Method*

Mark Fred, Norman H. Nachtrieb, and Frank S. Tomkins
J. Opt. Soc. Am. 37(4) 279-287 (1947)

A Hollow Cathode Source Applicable to Spectrographic Analysis for the Halogens and Gases*

J. Rand McNally, George R. Harrison, and Eugene Rowe
J. Opt. Soc. Am. 37(2) 93-98 (1947)

An Analysis of the Factors in Spectrochemical Microanalysis*

J. K. Hurwitz
J. Opt. Soc. Am. 42(7) 484-489 (1952)

Spectrochemical Analysis of High Copper in Cast Iron and Steel

W. R. Kennedy
J. Opt. Soc. Am. 37(3) 154-158 (1947)