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Magnesium Perchlorate as an Alternative Water Trap in AMS Graphite Sample Preparation: A Report On Sample Preparation at Kccams at the University of California, Irvine

  • G M Santos (a1), J R Southon (a1), K C Druffel-Rodriguez (a1) (a2), S Griffin (a1) and M Mazon (a1) (a3)...

Abstract

We present a brief discussion of sample preparation procedures at the Keck Carbon Cycle Accelerator Mass Spectrometer (KCCAMS), University of California, Irvine, and a systematic investigation of the use of Mg(ClO4)2 as an absorptive water trap, replacing the standard dry ice/ethanol cold finger in graphite sample preparation. We compare high-precision AMS measurement results from oxalic acid I and USGS coal samples using Mg(ClO4)2 under different conditions. The results obtained were also compared with those achieved using the conventional water removal technique. Final results demonstrate that the use of Mg(ClO4)2 as an alternative water trap seems very convenient and reliable, provided the Mg(ClO4)2 is replaced frequently.

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Copyright

Corresponding author

Corresponding author. Email: gdossant@uci.edu.

References

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Loyd, DH, Vogel, JS, Trumbore, S. 1991. Lithium contamination in AMS measurement of 14C. Radiocarbon 33(3):297301.
Pearson, A, McNichol, AP, Schneider, RJ, von Reden, KF, Zheng, Y. 1998. Microscale AMS 14C measurement at NOSAMS. Radiocarbon 40(1):6175.
Southon, JR, Santos, GM, Druffel-Rodriguez, K, Druffel, E, Trumbore, SE, Xu, X, Griffin, S, Ali, S, Mazon, M. The Keck Carbon Cycle AMS Laboratory, University of California, Irvine: initial operation and a background surprise. Radiocarbon , these proceedings.

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