80 times more sensitive than the nose The nose is a marvelously sensitive way to detect many materials, especially the more pungent ones. Imagine how useful to the chemical investigator an instrument that is many times more sensitive than the nose, vastly more capable of quantitating its measurement, and incomparably more reliable. The two chromatograms reproduced here demonstrate that the F & M Model 609 Flame Ionization Gas Chromatograph is such an instrument. Both chromatograms were produced from 1.0 ml samples of air-formaldehyde mixtures. The first one (A) contained just barely enough formaldehyde for a very sensitive nose to pick up; in the second sample (B), there was a more definite odor which most subjects could smell. In both cases, the Model 609 was operated at 1/80 of its full sensitivity. Nor does this example mark the limit of the 609's sensitivity. In other investigations at the F & M Applications Laboratory, the 609 has been used to detect 4ppb of ethylene in nitrogen. Time and again, it has detected nanogram (.001 microgram) quantities of a variety of organic compounds. The 609 has also proved its utility in other areas where odor detection is important, such as determining residual odors in packaging materials and analyzing the headspace of canned goods in the food processing industry. I t has also been used to control the fragrance quality in perfumes, cosmetics and soaps. The Model 609 incorporates many features that increase its usefulness to the laboratory. For example, it operates isothermally or programmed; accepts capillary or packed columns; handles solid, liquid or gas samples; and has automatic flame re-ignition. The Model 1609 Flame Ionization Detector attachment (without recorder or temperature controller, but with the same sensitivity and specifications as the 609) can be used in conjunction with an existing G.C. in your laboratory. For complete information about the Model 609 and 1609, and how they can be used to meet your specific requirements, write or phone F & M Scientific Corporation, Starr Road and Route 41, Avondale, Pennsylvania, 215—COlony 8-2281.
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