Abstract

A spectrochemical method has been evolved for the determination of trace elements in soils and plants with the objects of reducing the microphotometry involved in the variable internal standard method and of increasing the throughput of samples. A 3-step filter replaces the step sector and evaluation is achieved from an emulsion calibration curve prepared from step filter data using the Respektra calculator. The errors involved in certain stages are studied, and the resulting method shows an accuracy comparable to the original.

Spectrographic Determination of Trace Elements in 70/30 Brass and Admiralty Brass. Part I*

P. A. Leichtle
J. Opt. Soc. Am. 34(8) 454-463 (1944)

Rotating Step-Sector for Use with ac or Other Intermittent Spectrographic Light Sources

Richard N. Kniseley and Velmer A. Fassel
J. Opt. Soc. Am. 45(12) 1032-1034 (1955)

The Quantitative Spectrographic Analysis of the Rare Earth Elements*I. Determination of Samarium in NeodymiumII. Determination of Europium in Samarium

Velmer A. Fassel and Harley A. Wilhelm
J. Opt. Soc. Am. 38(6) 518-526 (1948)

A Step-Sector for the Astigmatic Spectrograph

Ralph E. Thiers
J. Opt. Soc. Am. 40(12) 849-851 (1950)

Wide Range Analysis for Zinc Using Spectrographic Line Widths

E. John Eastmond and Bernice E. Williams
J. Opt. Soc. Am. 38(9) 800-803 (1948)