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Two new preconcentrator based measurement systems for ethylene gas concentration in the ppbv range for the fruit logistic industry have been developed and examined. Two different detection principles have been applied: non dispersive infrared (NDIR)-detection and gas chromatography. A silicon based miniaturized gas chromatographic column was combined with a miniaturized silicon preconcentrator and...
A portable low-cost gas chromatographic measurement system will be presented. The system consists of a novel chromatographic column - which enables measurements at room temperature and ambient air - with a downstream micro machined gas sensor array and offers the separation and identification of volatile organic compounds. The targeted application is the monitoring of flavours directly during food...
Sandia's hand-held MicroChemLab system uses a micromachined preconcentrator, a gas chromatography channel, and a quartz surface acoustic wave array detector for sensitive/selective detection of gas-phase chemical analytes. Requisite system size, performance, power budget, and time response mandate microfabrication of the key analytical system components. In the fielded system, hybrid integration has...
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