Use of a chromatographic column to improve the selectivity of the SnO gas sensors: first approach towards a miniaturised device and selective with hydrogen fluoride vapours

doi:10.1016/j.snb.2004.10.002

Cited by 9 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…MS or FID). A small number of publications have also reported the limit of detection (LOD) of MOS sensor-GC systems, [29] for five alcohols, acetaldehyde, acetone and ethyl acetate, which reports detection limits of several ppb and [30] for hydrogen fluoride, with detection limits of 800 ppb. This investigation will assess the sensing abilities of a MOS sensor comprising a binary mixture of ZnO and SnO 2 when used as a secondary detector for a Clarus 500 GC-MS (the combination of this MOS sensor with GC has previously been demonstrated as highly sensitive and effective [11,14,31]).…”

Section: Introductionmentioning

confidence: 99%

Assessment of a combined gas chromatography mass spectrometer sensor system for detecting biologically relevant volatile compounds

et al. 2017

View full text Add to dashboard Cite

There have been a number of studies in which metal oxide sensors (MOS) have replaced conventional analytical detectors in gas chromatography systems. However, despite the use of these instruments in a range of applications including breath research the sensor responses (i.e. resistance changes w.r.t. concentration of VCs) remain largely unreported. This paper addresses that issue by comparing the response of a metal oxide sensor directly with a mass spectrometer (MS), whereby both detectors are interfaced to the same GC column using an s-swafer. It was demonstrated that the sensitivity of an in-house fabricated ZnO/ SnO2 thick film MOS was superior to a modern MS for the detection of a wide range of volatile compounds (VCs) of different functionalities and masses. Better techniques for detection and quantification of these VCs is valuable, as many of these compounds are commonly reported throughout the scientific literature. This is also the first published report of a combined GC-MS sensor system. These 2 different detector technologies when combined, should enhance discriminatory abilities to aid disease diagnoses using volatiles from e.g. breath, and bodily fluids. 29 chemical standards have been tested using solid phase micro-extraction; 25 of these compounds are found on human breath. In all but 2 instances the sensor exhibited the same or superior limit of detection compared to the MS. 12 stool samples from healthy participants were analysed, the sensor detected, on average 1.6 peaks more per sample than the MS. Similarly analysing the headspace of E. coli broth cultures the sensor detected 6.9 more peaks per sample versus the MS. This greater sensitivity is primarily a function of the superior limits of detection of the metal oxide sensor. This shows that systems based on the combination of chromatography systems with solid state sensors shows promise for a range of applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Assessment of a combined gas chromatography mass spectrometer sensor system for detecting biologically relevant volatile compounds

et al. 2017

View full text Add to dashboard Cite

show abstract

Towards a GC-based microsystem for benzene and 1,3 butadiene detection: Pre-concentrator characterization

Lahlou¹,

Sanchez²,

Vilanova³

et al. 2011

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Ammonia detection by a novel Pyrex microsystem based on thermal creep phenomenon

Martini-Laithier¹,

Graur²,

Aguir³

et al. 2014

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

International audienceOur research work aims to develop a microfluidic system for gas analysis by using an original principle of integrated pumping. This microsystem can detect ammonia and the gas flow parameters inside the channel can be also controlled. The proposed microdevice consists in a microchannel including an integrated gas sensor with a heater. The trioxide tungsten (WO3) is implemented as a sensitive layer. The integrated heater is used for two reasons: to optimize the sensor response and to induce the gas pumping inside the microchannel by thermal creep phenomenon, therefore, no external pumping system is required. The study of the pumping effect generation has been realized by thermal and microfluidic simulations. Thermal simulations have been performed to estimate the thermal gradientalong the microchannel. In addition, the microfluidic modelling allows us to determine the mass flow rate for different thermal gradient profiles, obtained from the thermal simulations. Finally, a completePyrex microsystem has been realized to detect ammonia. The existence of the thermal pumping has been demonstrated experimentally

show abstract

Use of a chromatographic column to improve the selectivity of the SnO gas sensors: first approach towards a miniaturised device and selective with hydrogen fluoride vapours

Cited by 9 publications

References 13 publications

Assessment of a combined gas chromatography mass spectrometer sensor system for detecting biologically relevant volatile compounds

Assessment of a combined gas chromatography mass spectrometer sensor system for detecting biologically relevant volatile compounds

Towards a GC-based microsystem for benzene and 1,3 butadiene detection: Pre-concentrator characterization

Ammonia detection by a novel Pyrex microsystem based on thermal creep phenomenon

Contact Info

Product

Resources

About