SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 28:359-363 (1964)
© 1964 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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The Use of Liquid Scintillation for the Assay of Carbon-14 in Clay and Soil Suspensions1

A. L. Page, James R. Sims and F. T. Bingham2

ABSTRACT

The use of liquid scintillation for the assay of C14 in layer silicate and soil suspensions is evaluated by various procedures with several scintillator media. The effects of sample weight, color, settling time, and the level of activity on the counting characteristics of scintillator media which contain soils and layer silicates are presented.

Highly statistically significant linear regressions, which differed for each solid tested, were obtained between the level of activity added and the observed activity. The differences between the materials tested were related predominantly to the color which the solid imparted to the scintillator medium.

A procedure for the determination of the retention of carbon compounds by layer silicates and soils is presented. The procedure described is specific, but can easily be modified to fit the needs of related studies.

NOTES

1 Paper No. 1507, Univ. of California, Citrus Research Center and Agr. Exp. Sta., Riverside. Presented before Div. S-2, Soil Science Society of America, Nov. 18–22, 1963, at Denver, Colorado. Support for this work by a grant (NSF-GP-323-Coleman) from the National Science Foundation is gratefully acknowledged.

2 Assistant Professor of Soil Science, Graduate Student, and Associate Professor of Soil Science, respectively.

Received for publication August 30, 1963. Accepted for publication November 25, 1963.






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