Perkin-Elmer GC Mass Spectrometer. When you want a trace analysis capability approaching 10 grams. CHART 1 (M/S) TOTAL ION MONITOR TRACE ^ ^
CHART 2 (GC) FLAME IONIZATION DETECTOR TRACE
MASS SPECTRUM OBTAINED FROM INJECTION OF SAMPLE CONTAINING 1CH GMS. OF METHYL STEARATE.
METHYL LAURATE METHYL MYRISTATE METHYL PALMITATE METHYL OLEATE METHYL STEARATE
SAMPLE: METHYL ESTERS OF COCONUT OIL
The finest GC/MS system ever designed for trace analysis, it combines a true mass spectrometer with the famed Perkin-Elmer Model 990—the standard for gas chromatographs. It is particularly ideal for applications such as air and water pollution, toxicology, forensics and pharmaceuticals. As an example of how this instrument operates, we have reproduced here an analysis of
methyl stéarate. Note how accurate identification is assured by the chart from the double pen recorder. It gives an instant side-by-side qualitative comparison of each compound as it passes through the flame ioniz a t i o n d e t e c t o r of t h e g a s chromatograph and the total ion monitor of the mass spectrometer. (Visible proof that what has gone through the GC is going through the mass spectrometer.) For com-
plete and accurate identification, the mass spectrum of each component can be run as shown in chart 2. Be positive about your trace analyses with a Perkin-Elmer Gas Chromatograph/Mass Spectrometer System. Write for full particulars t o : I n s t r u m e n t D i v i s i o n , Perkin-Elmer Corporation, 702 Main Ave., Norwalk, Conn. 06852.
PERKIN-ELMER
CIRCLE 1 3 4 O N READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 43, NO. 6, MAY 1971
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