1. Technetium-99 in Urine Tabitha Liebrecht & Buzz Vickery
Severn Trent Laboratories Richland
2800 George Washington Way
Richland, Wa
(509)

2. Advantages of Eichrom Method (Summary)
Time saving
Waste reduction
Yield

3. Method Summary (Step One - Urine Prep)
Sample Pour-up
Prepare Sample

4. Method Summary (Step Two - Separations and Counting)
Acid Digestion/Transfer
Prepare sample for TEVA disk
Filter/Separation via TEVA disc
Prepare sample for LSC

5. Ion Exchange vs. TEVA Disc
Ion Exchange method spike yield (1999)
300ml sample size w/ 85.04% yield
TEVA disc method spike yield (2000)
300ml sample size w/ 95.23% yield
Yield increase
Average of 10% increase in spike recovery

6. Ion Exchange vs. TEVA Disc (continued)
tSIE 100%
Lum 66.0%
New method MDA 15%
Contractual MDA = 35 pCi/L

7. Ion Exchange vs. TEVA Disc (continued)
Analysis time saving
48 hours vs 12 hours
Cost Savings (11 samples/batch)
75% savings per batch (FTE)

8. Waste Summary 800ml vs 350ml of acidic waste
60% decrease in waste produced
Waste disposal savings of $0.66 per sample analyzed

9. Conclusions Improved TAT Decreased waste Increased yields Lower MDA
Improved reliability

10. Future Eichrom Projects
Np-237 by TEVA with ICP/MS (via Eichrom ACW08 and ACU03)
Th separation
Am/Pu/U by TRU/UTEVA (via Eichrom ACW03)
Strontium by Sr resin (via SRW01)
Tc-99 in soil
Pb-210 Single Operator Test

11. Thanks to Eichrom Anil Thakkar and Larry Jassin