Portable battery-powered flow injection analyser for volatile alcohols using semiconductor gas sensors

A field-portable gas analyzer with an array of six semiconductor sensors. Part 1: Quantitative determination of ethanol

“…Figure 4 shows a bar plot of the response pattern for pure butane and 1.0% ethanol, revealing that different patterns were observed. In the case of the two-sensor analyzer reported previously, 18 there was also discrimination observed between ethanol and butane. However, the six-sensor response pattern is much more useful for identification of individual gas or vapor components, because of the improved discrimination.…”

“…The major advantage of this arrangement, as discussed previously, is that it allows for 18,20 a minimal exposure of the sensors to the gas sample and thus minimizes the chance of poisoning the sensor surface. Another advantage of this arrangement is that the sensors can be interchanged throughout the compartment.…”

A field-portable gas analyzer with an array of six semiconductor sensors. Part 2: Identification of beer samples using artificial neural networks

“…However, previous studies reported a portable gas sensing monitor fitted with two different tin-oxide sensors used in the flow-through mode, whereby improvements in stability, sensitivity, and reproducibility were demonstrated. 1 These Taguchi sensors showed no loss of activity and no baseline drift during the course of the study. This portable, multisensor gas analyzer was in continuous operation for before recharging was 3 h necessary.…”

“…The development of portable, battery-powered multisensor gas analyzers has been described previously and [1][2][3] applied to the analysis of ethanol in liquor samples. Portability is important for many reasons, as reported in a special issue on field-portable analytical instrumentation edited by…”

Portable Trap–Sensor System for Monitoring Low Levels of Ethylene

“…1 These techniques, although useful, remain complicated and are too expensive for many applications. Simple portable gas monitors based on flow injection analysis have been described for ethanol using SnO 2 sensors 2 and for H 2 S using an amperometric sensor. 3 These devices, however, require reference air, free from analyte gas, which may be difficult to provide in some applications.…”