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G. Carayon1, V. Schmitt2, and L. VIVOLA1. (1) Alpha M.O.S., 20 Avenue Didier daurat, Toulouse, 31400, France, (2) Alpha M.O.S America, 33 North River St., Hillsborough, NJ 08844 The human nose does not identify, separate, nor quantify volatile compounds. A global signal is transmitted from human olfactory cells to the brain and converted into odor descriptors. With the development of electronic noses, Alpha M.O.S. mimics this mechanism with such innovative technologies as metal oxide sensors, fingerprint mass spectrometry, and recently ultra-fast gas chromatography. Using an array of two columns with several polarities that respond differently to each volatile chemical, but in a way similar to the human nose, Heracles provides a unique signature of your product, via a chemical or olfactive fingerprint, as well as quantification on specific molecules in complex matrices. The Heracles proposes innovations regarding (1) Sampling: Liquid, gas or solid samples can be analyzed with several injection modes (Headspace, SPME, Trap); (2) Detection: HERACLES Flash E-Nose includes an ultra-fast gas chromatography technology. VOCs analysis is obtained in less than 60 sec. The combination of two columns with different polarities associated with FID detectors offers detection of complex matrices. With the trap using Tenax or Carbosieve support, a very low sensitivity detection is achieved; (3) Results: The response of the detectors is converted into a chemical fingerprint, thanks to several statistical models. The presentation of this new instrument will detail the technological improvements (dual column with FID detection system, fast temperature programming > 20 °C/sec, large and small volume injection, dilute and concentrated samples, trap back flushing, dry purging, multifunctional sorbent-based trap injector, volatile and semi-volatiles, and liquid compounds); and the software functionalities (chromatogram, fingerprint charts such as PCA, DFA, SIMCA, PLS, and sensory panel graphs such as Radar Plot). This instrument will facilitate continuous processing using small-scale equipment and improve productivity through better decision-making by plant personnel for process applications such as cleaning-in-place process for foods or beverages.
Session 56, NEW PRODUCTS & TECHNOLOGIES: Innovations in analytical and microbiological testing
2005 IFT Annual Meeting, July 15-20 - New Orleans, Louisiana |