G5LE OF CONTENTS Page 1. Introduction i 2. Experimental 5 2.1 Sampling Method 5 2.c Preparation of the Sample 5 2.5 Extraction and Separation 5 2.4 Counting 6 2.5 Reproducibility 7 2.6 Yield 9 2.7 Interferences 13 2.8 Comparison of Extraction Method and Fusion 14 2.9 Stable Strontium 15 2.10 Calcium-Strontium Separation 15 3. Conclusions 4, Appendix . . Collection of Soil Samples for Strontium-90 Assay Analytical Procedure for the Acid Extraction and Analysis of Strontium-90 in Soil 21 oh / by Iyle T. Alexander 4,2 21 i 4.1 20