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Neutron Activation Analysis of Standard Soils¹

ABSTRACT

Four standard soils prepared by the Canadian Certified Reference Materials Project were analyzed for 25 elements to test for inhomogeneities within samples and to demonstrate the use of neutron activation for soil analysis. Five subsamples, weighing about 100 mg apiece, from each of two splits of each standard soil were analyzed. The precision of measurement as measured by the coefficient of variation was < 5% for 20 elements. No soil had more than four elements that differed significantly in concentrations between two splits at the 95% level of significance. Eight of the 12 differences that are significant occur for elements whose coefficient of variation is 2% or less.

¹ Contribution from the Univ. of Wisconsin, Dep. of Soil Science, Madison, WI 53706. This research was supported in part by the College of Agric. and Life Sci., Univ. of Wisconsin-Madison; in part by funds from the Wisconsin Power and Light Co., Madison Gas and Electric Co., and Wisconsin Public Service Corp.; in part by the Environmental Protection Agency under grant number R803971; in part by U.S. Energy Research and Development Administration contract EY-76-5-02-1515-Jackson. The contents do not necessarily reflect the views and policies of the federal agencies or power companies, nor does mention of trade names or commercial products constitute endorsement or recommendation for use.

² Research Assistant and Assistant Professor of Soil Science, respectively, Univ. of Wisconsin, Madison, WI 53706.

Received for publication August 10, 1977. Accepted for publication October 25, 1977.