1. Department of Chemistry, Center for Advanced Sensors & Environmental Monitoring (CASE), State University of New York-Binghamton, P.O. Box 6000, Binghamton, New York 13902
2. Office of Law Enforcement Standards, National Institute of Standards and Technology, Technology Services, 100 Bureau Drive, Mail Stop: 2000, Gaithersburg, Maryland 20899-8102
3. Battelle Memorial Institute, 505 King Avenue, Columbus, Ohio 43201