Fig. 1. Schematical diagram of digestion methods for the determination of uranium content in soil (validation test level 1).
Fig. 2. Comparison of analytical results of total uranium in soil according to the various digestion method using SRM 2711a and field soil having different organic content (soil-a: 1.6%, soil-b: 5.8%, soil-c: 10.6%).
Table 1. Physicochemical characteristics of soil used in validation test (level 2)
Table 2. Analytical conditions of ICP-MS measurement
Table 3. Summary of each digestion method for the determination of total uranium in soil (validation test level 1)
Table 4. Summary of each digestion method for the determination of total uranium in soil (validation test level 2)
Table 5. Analytical results of total uranium content in soil according to the various pre-treatment methods
Table 6. Statistical results of one-way ANOVA test
Table 7. Comparison of total uranium content and precision according to the various digestion methods
Table 8. Comparison of total uranium content according to microwave digestion time
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