Soil or Vegetation Nominal 10 g Soil or 5900 g Dry Vegetation Soil : Sample Digestion HF- HNO 3—HCl Vegetation sample Digestion HNO 3 -HCI-H505 HF-HNO3 Fe Scavenging NH4OH (CO3 - free) isolation of U on Anion Exchange Resin Removal of Fe with lsopropyl Ether E lectrodeposition of U and Alpha Spectrometry FIGURE 1. FLOW CHART OF TENTATIVE PROCEDURE TO ISOLATE ALPHA SPECTROMETRICALLY PURE U. 19