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Sometimes» a new idea callsfora whole new design.
A technological advance can turn yesterday's bright idea into today's antiquated thinking. That's exactly what has happened in the field of mass spectrometry. At one time, electron impact ionization was the method of choice to ionize samples for analysis. Now, a brighter idea has come along—chemical ioniza tion. As a result, electron impact mass spectrometry alone, is not adequate. Today most manufacturers are merely modifying their existing EI/MS equipment to operate as a CI/MS system. Only one company has come up with a wholly new design that makes the new idea work best. The company is Scientific Research Instru ments. The result is Biospect. Biospect is the only instrument on the market that gives you the full
benefits of chemical ionization. It is the only MS built from the ground up to maintain the high source pressures and low analyzer pressures—and this is the very heart of effective CI/MS. However, if you still need to generate El spectra, Biospect can operate equally well in an El mode. With Biospect, you get almost complete control of sample ionization, greater sensitivity, finer selectivity, and spectra which are much easier to interpret. Biospect also gives you a whole new approach in the field of CI/MS accessories. You can name your own brand of gas chromatograph and/or computer hardware, the one that's best for your job—then we'll put the system together for you and take systems responsibility. Biospect . . . The Chemical Ioniza tion Mass Spectrometer. If you want to know more about CI/MS, Biospect, and the comparative features CI/MS vs ΕΙ/MS, ask for our brochure B101.
SEARLE Scientific Research Instruments Subsidiary of G. D. Searle & Co. 6707 Wtittestone Road Baltimore, Maryland 21207 (301)944-4020 CIRCLE 215 O N READER SERVICE CARP
