Boopesh, Along with Dominik's excellent advice, I would recommend contacting the APS safety folks *well* in advance of the experiment. I would guess that they will require that the samples be packaged at home and shipped to the APS and that you have additional containment. Getting the safety people involved will certainly add to the amount of work you'll have to do, but organomercury compounds are serious business. B -- Bruce Ravel ------------------------------------ bravel@bnl.gov National Institute of Standards and Technology Synchrotron Methods Group at NSLS --- Beamlines U7A, X24A, X23A2 Building 535A Upton NY, 11973 My homepage: http://xafs.org/BruceRavel EXAFS software: http://cars9.uchicago.edu/~ravel/software/exafs/