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Simplified Method for Detecting Tritium Contamination in Plants and Soil

^a U.S. Geological Survey, 333 West Nye Lane, Room 203, Carson City, NV 89706
^b U.S. Geological Survey, Denver Federal Center, P.O. Box 25046 MS-407, Lakewood, CO 80225
^c U.S. Geological Survey, 345 Middlefield Road, MS-434 and MS-421, respectively, Menlo Park, CA 94025

View larger version (74K): [in a new window]   Fig. 1. Apparatus for batch filtration and solid phase extraction. The removable upper filtration assembly (a–d) includes: advancement nut and threaded guide rod (a), filter–plunger compression board (b), syringeless filters (c), and base (d). The lower column–bottle assembly (e–h) includes: column suspension board (e), solid phase extraction column (f), sample collection bottle (g), and base (h).

View larger version (26K): [in a new window]   Fig. 2. Relation between tritium concentrations in solar-distilled, solid phase–extracted creosote bush water and toluene-extracted creosote bush water collected in April 2001.

View larger version (21K): [in a new window]   Fig. 3. Relation between tritium concentrations in solar-distilled, solid phase–extracted creosote bush water and soil water vapor collected in April 2001.