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Published in Soil Sci Soc Am J 29:71-72 (1965)
© 1965 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Sulfur in Plant Materials by Digestion with Nitric and Perchloric Acid1

R. W. Blanchar, George Rehm and A. C. Caldwell2

ABSTRACT

A method for the determination of S in plant materials is described. The material is oxidized by nitric and perchloric acid using a heating block to reduce perchloric acid loss. The SO4 content of the solution is determined turbidimetrically as BaSO4. The proposed method has been found to be more accurate and rapid than the conventional dry ashing procedures for the determination of S in plant material.

NOTES

1 Paper No. 5355 of the Scientific Journal Series, Minnesota Agr. Exp. Sta., University of Minnesota, St. Paul, Minn.

2 Graduate Students and Professor of Soil Science, respectively.

Received for publication May 15, 1964. Accepted for publication September 18, 1964.






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Copyright © 1965 by the Soil Science Society of America.