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Technetium-99 in Urine

Technetium-99 in Urine. Tabitha Liebrecht & Buzz Vickery Severn Trent Laboratories Richland 2800 George Washington Way Richland, Wa 99352 (509)375-3131. Advantages of Eichrom Method (Summary). Time saving Waste reduction Yield. Method Summary (Step One - Urine Prep). Sample Pour-up

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Technetium-99 in Urine

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  1. Technetium-99 in Urine Tabitha Liebrecht & Buzz Vickery Severn Trent Laboratories Richland 2800 George Washington Way Richland, Wa 99352 (509)375-3131

  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 improvement @ 100% • Lum improvement @ 66.0% • New method MDA improvement @ 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 EichromAnil Thakkar and Larry Jassin

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