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the ion trap m/z range is a function of both field condition and trap size, different diameter traps store ions with different m/z values despite sharing electrical parameters. “People typically scan something [when operating an ion trap MS],” says Badman, “usually it’s voltage, sometimes it’s frequency. We’re holding everything constant and, effectively, scanning the size.” Badman points out that it’s difficult to modify the physical dimensions of an ion trap in real time, but an array of variously sized traps provides the same information: m/z as a function of trap diame-
ter. As in Reilly’s design, power and vacuum demands are decreased in devices that Badman calls spatially dispersive, nonscanning CITs. However, by eliminating the rf amplitude scan, the complexity and size of the system’s power supply are further diminished. Badman proposes that these novel CIT arrays are amenable to two operating modes. In one configuration, CIT diameters are chosen to capture ions with specific m/z ratios, as might be necessary in monitoring for known classes of molecules or certain compounds. Alternatively, an array of CITs with graduated sizes could rapidly
generate spectra similar to those produced by individual ion traps operated in the conventional mass-selective instability mode. In either mode, Badman is considering groups of CITs of each size to address charge capacity limitations, leading to arrays of CIT arrays. Regardless of the differences in their approach to the CIT design, both Reilly and Badman predict that CIT arrays will someday lead to handheld MS systems that permit field measurements under conditions that currently require returning samples to laboratories.
PEOPLE Division awards Six analytical chemists will receive awards from the ACS Division of Analytical Chemistry. Four of the awards will be presented at special symposia at the ACS fall national meeting in Washington, DC. The Award in Spectrochemical Analysis will be given at FACSS in September in Nashville, TN, and the Findeis Award will be given at the Eastern Analytical Symposium in October in Atlantic City, NJ. Joseph A. Caruso, a professor at the University of Cincinnati, will receive the Award in Spectrochemical Analysis sponsored by PerkinElmer. Caruso’s research interests include atomic spectrometry, chemical trace analysis, and plasma spectrochemistry. Kimberly A. Prather, an associate professor at the University of California—Riverside, will receive the Arthur J. Findeis Award for Achievements by a Young Analytical Scientist sponsored
by Philip Morris Companies. Her research interests include aerosol time-of-flight MS, which provides the size and chemical composition of individual aerosol particles in real time. Roland F. Hirsch, a physical scientist at the U.S. Department of Energy, will receive the Award for Distinguished Service in the Advancement of Analytical Chemistry sponsored by Waters. Hirsch is being honored for his years of service to the Division as the secretary, chair, councilor, Web site developer, and editor. John Bennet Fenn, a professor at the Virginia Commonwealth University, will receive the Award in Chemical Instrumentation
sponsored by Dow Chemical. He is a pioneer in the development of electrospray ionization MS. Richard L. McCreery, a professor at Ohio State University, will receive the Award in Electrochemistry sponsored by EG&G Princeton Applied Research. McCreery’s research interests include surface spectroscopic studies, particularly Raman spectroscopy of electrochemical processes, and spectroscopic studies of biological samples. Harold M. McNair, a professor at Virginia Polytechnic Institute and State University, will receive the J. Calvin Giddings Award for Excellence in Education sponsored by the Dekker Foundation. His research interests include capillary-column and fast GC and microbore and packed capillary-column HPLC.
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