FINNIGAN CORPORATION

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Interpretation of mass spectra from a Finnigan Mass Spectrometer is already straightforward... **£*•:.

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. . . due to the inherent linear mass display of our Quadrupole Mass Spectrometers.

But with our System/150 computer controlled GC/MS system...

. . . mass spectra interpretation becomes almost trivial.

You can spend more time as a chemist less time as a technician, because System/150: Saves time. • It runs unattended-computer controls MS scan. • It doesn't miss a thing-computer acquires and stores all spectral data. • It selects important data-computer can monitor only mass regions of interest. Ο It keeps you informed—plots a gas chromatogram in real time. Extracts even the smallest peaks from noise. • It finds the maximum signal—computer control monitors peak tops only. • It reduces noise-computer time av­ eraging improves signal-to-noise ratio up to 15 times. Provides positive identification of mass numbers. • It calibrates automatically-the operator does not have to identify reference peaks to allow the computer to calibrate. • It calibrates to a known reference com­ pound—absolute, fool-proof calibration. • It labels all components—computer assigns correct mass numbers

2631 Hanover Street, Palo Alto, California 94304 (415) 328-3730

to spectra. • It identifies mass defects-computer locates peak maximum to 0.1 amu. Simplifies spectra interpretation. • It identifies GC peaks-correlates selected mass fragments to the chromatogram. • It does the arithmetic-both relative abundance and percent total ion intensity are provided. I I It eliminates contaminants—background spectra due to GC column bleed and other impurities can be sub­ tracted. • It shows you even the smallest peak—low intensity peaks can be expanded for closer visual examination. • It eliminates the paperwork-all spec­ tral data can be stored on magnetic tape for post-run processing or historical files. Write or call today for more information or a private demonstration from the only company that delivers guaranteed performance with a turnkey instal­ lation of a complete GC/MS computer system.

finnigan F I N N I G A N

C O R P O R A T I O N

Offices in Union, New Jersey; Chicago, Illinois; Hemel Hempstead, U.K. Munich, Germany; Basel, Switzerland.

Circle No. 48 on Readers' Service Card

ANALYTICAL CHEMISTRY, VOL. 42, NO. 7, JUNE 1970 ·

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