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Comparison of Electrode and Flame Photometer Methods for Sodium Analysis of Soil Water¹

ABSTRACT

A total of 126 soil water samples from solonetzic soils in southern Illinois were analyzed for sodium by the electrode method using a Beckman (No. 78187V) Na⁺ sensitive electrode, and by the flame photometer method. The results obtained from these two methods agree closely as indicated by the highly significant correlation coefficient, r = 0.9989.

¹ Contribution from the Department of Agronomy, University of Illinois, Urbana. Published with the approval of the Director of the Illinois Agr. Exp. Sta.

² Associate Professor, Graduate Fellow, and Associate Professor, respectively.

Received for publication April 27, 1962. Accepted for publication May 23, 1962.