Identify GC Fractions at the Push of a Button
Pushing a button is all that is necessary for rapid identification of GC fractions. The Norcon RS-1 GC Identifier® is the first practical instrument that will give you on-line IR Spectra from 2.5 to 15 micrometers in just six seconds. Qualitative information on an homologous series can be obtained on a Gas Chromatograph. A GC-MS combination affords additional information on the identity of compounds but at a premium cost to your lab. The RS-1 GC Identifier is the only instrument, that gives you sample identification and functional group information in about the time it takes you to run your chromatogram at 1/3 to 1/10 the cost of a GC-MS system. A relatively untrained technician can operate and maintain the RS-1 very economically.
such as the electron capture detector (19) are well known and can be used in forensic work to enhance the sensitivity of detection of a drug by preparing, for example, its perfluoracyl derivative. Others, such as the thermionic detector (20), are sensitive only to compounds containing nitrogen and phosphorus. This means that the work-up of material before GC analysis can be greatly reduced. The specificity of the detector ensures that only the compounds of interest (e.g., barbiturates with nitrogen or organic pesticides with phosphorus) are "seen" by the gas chromatograph, and coextractants which would previously have interfered with the identification pass through the machine almost unnoticed (Figure 5). It is almost superfluous to add a note of caution at this stage; the technique is applicable only to those circumstances where it is desired to know whether a particular compound is present or not. The second application of gas chromatography is one of which petroleum chemists are already well aware. It is in the characterisation of hydrocarbons. It is now fairly commonplace with arson cases to extract the debris from the fire and to identify the incendiary material according to its type, whether it is aviation spirit, gasoline, light oil, heavy oil, diesel fuel, and so on. Capillary columns are used for this. Occasionally, if the police are fortunate enough to find the arsonist with fuel in his possession, it is possible to say whether that particular fuel was used to cause the fire. Not all hydrocarbons are amenable
For laboratories already equipped with GC-MS, the RS-1 represents the perfect complement. Total analysis is obtained with an on-line GC, RS-1, MS system. With built-in computer compatibility, the RS-1 can be readily interfaced into your lab data acquisition system. An optional interface is available for low cost "CAT" signal averagers. Typical applications of the RS-1 include: Analysis of aqueous solutions · Investigation of competitive products · Analysis of reaction products including trace impurities and many more. The RS-1 Fact File contains reprints of technical articles about the RS-1, application data sheets, specifications, and prices. Use reader service number for your copy, or contact Norcon.
norcon Instruments, Inc. 132 Water Street, South Norwalk, Conn. 06854, U.S.A. (203) 853-2224 — Telex 96-5857 FOR INFORMATION CIRCLE NO. 148 FOR DEMONSTRATION CIRCLE NO. 149 1080 A · ANALYTICAL CHEMISTRY, VOL. 45, NO. 13, NOVEMBER
1973
Time (min) Figure 6. HPLC analysis of an engine oil by use of (a) fluorescence, (b) ultraviolet detectors
