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Band 83 -2. Suspension counting of the soil sample in a thixotropic gel system. The method was found excellent, especially with Thixcin-concentrations between 2.5-1Oo/o and sample weights not in excess of 200 mg per each 5-dram-vial.3. The highest effeciency was observed in the ,,Internal Plating Technique". Here too, a sample size of not more than 200mg per 5-drambottle appears to be most feasable for high radiation yield and counting efficiency.Suspension-and Plating-technique can serve as valuable alternative methods in direct determination of the activity of sieved soil samples by means of Liquid Scintillation Counting.S c h r i f t t u m

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