Sniffer 9000
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 GC - Olfactometry is a recently
used Method in the Flavour and Frangrances Industry.
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Sniffer 9000
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GC - Olfactometry is a recently
used Method in the Flavour and Frangrances Industry.
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| GC - Olfactometry - Principle of operation. |
 In the past decades, many detection techniques have
been hyphenated to gas chromatography. Less attention has been paid to GC-olfactometry
(GC-O) in which the human nose plays the role of the detector. However, the human nose is
often more sensitive than any physical detector, and GC-O exhibits powerful capabilities
that can be applied to flavors and perfumes, as well as to any odoriferous products (e.g.
pollutants). Olfactometric (or “sniffing”) techniques allow the determination of
impact odorants in food. They can be classified into two categories: dilution
meth-ods,
which are based on successive dilutions of an aroma extract until no odor is perceived at
the sniffing port of the chromatograph; and intensity methods, in which the aroma extract
is only injected once but the smeller records the odor intensity as a function of time by
moving the cursor of a variable resistor. The Sniffer 9000 System is designed to be a
dedicated „Sniffing-Device“ as a stand alone unit to be connected to any GC
available on the market. The new Electronic- and Pneumatic design , based on a new
industry standard (LON) provides maxi-mum flexibility for future needs thuse protecting
your investements in the Laboratory. |
| GC - Olfactometry - Principle of operation. |
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| The GC - Olfactometry is a simple to use Method, by installing at the end of a chro-matographic column a splitt which alows the sample to be splitted (e.g. 1:50) FID De-tector /nose. The peak/odor impression correlation will then be performed by spe-cialised fragrancy chemists. | |
| Technical descriptîon | As heart of the Sniffer 9000 GCO technology is the dedicated GC/Olfactometer heated Interface. Brechbuehler AG has over 25 years experience in implementing hyphenated techniques by using special designed interfaces. The Sniffer 9000 interface is engineered to transfer the high resolution available on capillary columns to the olfactometry „Sniffing Port“ air delivered by any Capillary col-umn without loss of GC resolution and influence of oxidation or turbulance. Built as part of the current Sniffer 9000 System, the interface is manufactured from a single Stainless steel tube which is heated by direct current, thus giving the best possible temperature profile. The interface consists of a standard fused silica line resulting in a inert olfactometer interface. Engineered to combine hot column effluents with laminar streams of inert Make-Up gas generated by the Sniffer 9000 System and additional humidification air supply to deliver distinct odorants to humans subjects with minimum discomfort and maximum separation. Integrated into any GC System available on the market, Brechbuehler AG’s Sniffing 9000 System is one of the most flexible GC/Olfactometer Sys-tems available on the market. A special analog output allows the Sniffer 9000 to be connected to an additional Channel on an existing data system, or any integrator or recorder available in the lab, to record intensity via the integrated cursor wheel on the Hand-held Remote control unit. |