Effect of Working Atmospheres on the Detection of Diacetyl by Resistive SnO2 Sensor
| Autor: | Andrea Gnisci, Antonio Fotia, Lucio Bonaccorsi, Andrea Donato |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Fluid Flow and Transfer Processes
Technology QH301-705.5 Process Chemistry and Technology Physics QC1-999 General Engineering resistive sensor nanomaterials MOS tin oxide fermentation diacetyl Engineering (General). Civil engineering (General) Computer Science Applications Chemistry General Materials Science TA1-2040 Biology (General) Instrumentation QD1-999 |
| Zdroj: | Applied Sciences, Vol 12, Iss 367, p 367 (2022) Applied Sciences; Volume 12; Issue 1; Pages: 367 |
| ISSN: | 2076-3417 |
| Popis: | Nanostructured metal oxide semiconductors (MOS) are considered proper candidates to develop low cost and real-time resistive sensors able to detect volatile organic compounds (VOCs), e.g., diacetyl. Small quantities of diacetyl are generally produced during the fermentation and storage of many foods and beverages, conferring a typically butter-like aroma. Since high diacetyl concentrations are undesired, its monitoring is fundamental to identify and characterize the quality of products. In this work, a tin oxide sensor (SnO2) is used to detect gaseous diacetyl. The effect of different working atmospheres (air, N2 and CO2), as well as the contemporary presence of ethanol vapors, used to reproduce the typical alcoholic fermentation environment, are evaluated. SnO2 sensor is able to detect diacetyl in all the analyzed conditions, even when an anaerobic environment is considered, showing a detection limit lower than 0.01 mg/L and response/recovery times constantly less than 50 s. |
| Databáze: | OpenAIRE |
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