A planar micro-concentrator/injector for low power consumption microchromatographic analysis of benzene and 1,3 butadiene

Abstract

In the present study, we present the first steps of the development of a low power consumption GC microsystem for the analysis of benzene in the presence of butadiene, involved in petrochemical industrial applications. This system is made by coupling a low power consumption planar microhotplate based on a preconcentrator with good preconcentration capability and a spiral microchromatographic column that presents a separation capability of both compounds at room temperature, when tested in front of a gas sensor. The first characterization results of the device showed a successful injection of benzene and butadiene when placed in front of the micro-separation module.

Recent developments and trends in miniaturized gas preconcentrators for portable gas chromatography systems: A review

“…In the last decade, only few planar preconcentrators have been reported in the literature. Lahlou et al [25] developed a planar micropreconcentrator-injector for the detection of benzene. This device consisted of a planar rectangular membrane of a 1.2 µm thick SiO2/Si3N4 dielectric layer, which was suspended on a silicon substrate.…”

“…Figure 11 represents the sensitivity (in pg) of different portable GC as a function of air sample volume (mL) used for VOC detection with either photoionization detector (PID) [4,10,11,15,[17][18][19][20][21] or other detectors such as thermal conductivity detector (TCD) [12], chemiresistor (CR) [2,6], capacitive detector (CD) [24] and metal oxide sensors [8,13,23,25]. The data presented in Figure 11 have been extracted from the literature when both sensitivity (in pg) and gas sample volume were available.…”