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48 the error of the standards and the stability of the signal. Detection limits for most species 3 sigma are less than one pgmL in solution. The ELAN DRC II ICP-MS is equipped with a Dynamic Reaction Cell DRC. In essence the DRC allows for chemical reactions to take place before the quadrupole mass filter. This is an excellent research tool that can be applied to the removal of isobaric interferences such as U238H-1 on Pu-239 and Ar-40O-16 on Fe-56. There are a variety of gases used for the reaction cell but the most common ammonia gas. Multi-Collector ICP-MS MC-ICP-MS The multi-collector ICP-MS is one of the newest and provides one of the largest leaps in technology in recent plasma spectrochemistry. The MC-ICP-MS is a hybrid of the quadru- pole ICP-MS and the TIMS. The resulting instrument is one that has a much more robust ion source plasma and the magnetic sector capabilities of the TIMS. However the result- ing instrument makes high precision isotope ratios available to almost any element in the periodic table regardless of the ionization potential of the element. The Nu instrument installed in the AL makes use of a radiological hood as the other ELAN ICP-MS. The instrument is equipped with 15 separate detectors 12 Faraday Cups and 3 full size electron multipliers. Two of the three electron multipliers are equipped with high abundance filters that increase the abundance sensitivity from approximately 5 ppm to ap- proximately 200 ppb. This is a useful tool when analyzing small isotopes next to very large ones. The analytical figures of merit are essentially the same for the MC-ICP-MS and the TIMS. Totals and isotopic compositions have been compared and have been statistically the same. The control charts for U and Pu measurements are in the process of being developed. A researcher performing work in a glove box.