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Rapid Method for Determining the Adsorption of Nickel-63 to Kaolinite¹

ABSTRACT

A supernatant isolation system was investigated as a means to assay ⁶³Ni adsorption to kaolinite. The Titertek Supernatant Collection System utilizes microtiter wells as the reaction chamber and cellulose-acetate cartridges to separate kaolinite from supernatant. The ⁶³Ni absorbed into the cartridge was assayed on a scintillation counter.

The supernatant of 96 wells could be separated from the kaolinite in under 5 min. The coefficient of variation for all measurements averaged 6.83%. The primary limitation of this system is the lengthy equilibration time.

¹ Scientific Article no. A-3115 and contribution no. 6181 of the Maryland Agric. Exp. Stn., Dep. of Agronomy, College Park, MD 20742.

² Assistant Professor of Agronomy, Dep. of Agronomy, University of Maryland, College Park, MD 20742.

Received for publication February 12, 1982. Accepted for publication April 28, 1982.