کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
741398 | 894237 | 2008 | 6 صفحه PDF | دانلود رایگان |
In the present work, a silicon-based preconcentrator is proposed and developed, which consists of a spiral-shaped micro-preconcentrator followed by a μ-hotplate sensor matrix. The shape of the preconcentrator was chosen according to technological and gas-flow limitations as it is required that the whole gas flow passes through the adsorbent in order to obtain a good concentration factor. Therefore, a spiral-shaped configuration was adopted with a 10-cm length, and a width/depth of 300 μm. In this case, the carrier flow is high enough to avoid stagnation but provide a fast evacuation of the gas after applying a thermal desorption pulse. The proposed spiral μ-preconcentrator leads to a robust and highly integrated device able to be incorporated in a GC/MS-gas sensor system.
Journal: Sensors and Actuators B: Chemical - Volume 132, Issue 1, 28 May 2008, Pages 149–154