The GERSTEL ODP 4 GC-O port enables the instrumental and olfactory detection of odorous substances in parallel.
The sample separated by gas chromatography is split using a splitter and transferred to the different detectors.
A defined portion of the sample is used for olfactory analysis. Its transfer occurs non-discriminatory, via a heated transfer line.
During the olfactory analysis, the operator can record the impressions and the olfactory intensity for later comparison.
The ODP Recorder software records the intensities of the odorous analytes and the voice comments related to the sample.
Substances of olfactory interest can be isolated and enriched using the Sniff-and-Trap function.
The device allows the isolation and concentration on an adsorbent tube of the odorous compounds of interest, within a defined retention time window (without the need for complex column switching systems).
Thermal desorption of the compounds trapped on the tube can be subsequently performed in the GERSTEL TDU thermal desorption unit for further analysis.
The ODP olfactometric port in combination with the Sniff & Trap function allows the simplified management of two types of analytical procedures:
- Collection of the separated volatile compounds in a defined retention time range and reanalysis of the trapped compounds on a GC column with orthogonal polarity (offline heartcutting) for the separation of the co-eluted compounds.
- Concentration of compounds not detected in the chromatogram, but detected olfactorily by the operator, this collection can be repeated on the same tube for several GC runs, in order to obtain a GC detectable amount for subsequent analysis and determination.
The ergonomic design of the ODP 4 has been studied to facilitate the operator's work, the device can be used with or without a nose cone.