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Solid phase microextraction sampling of high explosive residues in the presence of radionuclides and radionuclide surrogate metals

Solid phase microextraction sampling of high explosive residues in the presence of radionuclides and radionuclide surrogate metals,10.1007/s10967-007-

Solid phase microextraction sampling of high explosive residues in the presence of radionuclides and radionuclide surrogate metals   (Citations: 1)
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The Federal Bureau of Investigation (FBI) Laboratory currently does not have on site facilities for handling radioactive evidentiary materials and there are no established FBI methods or procedures for decontaminating high explosive (HE) evidence while maintaining evidentiary value. One experimental method for the isolation of HE residue involves using solid phase microextraction (SPME) fibers to remove residue of interest. Due to their high affinity for organics, SPME fibers should have little affinity for most metals. However, no studies have measured the affinity of radionuclides for SPME fibers. The focus of this research was to examine the affinity of dissolved radionuclide (239/240Pu, 238U, 237Np, 85Sr, 133Ba, 137Cs, 60Co and 226Ra) and stable radionuclide surrogate metals (Sr, Co, Ir, Re, Ni, Ba, Cs, Nb, Ru, and Nd) for SPME fibers at the exposure conditions that favor the uptake of HE residues. Our results from radiochemical and mass spectrometric analyses indicate these metals have little measurable affinity for these SPME fibers during conditions that are conducive to HE residue uptake with subsequent analysis by liquid or gas phase chromatography with mass spectrometric detection.
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