A Prototype Sensor for In Situ Sensing of Fine Particulate Matter and Volatile Organic Compounds.

Autor: Ng CL; Singapore-MIT Alliance for Research and Technology (SMART) Centre, 1 CREATE Way, CREATE Tower, #10-01, Singapore 138602, Singapore. kelvinng@smart.mit.edu., Kai FM; Agency for Science, Technology and Research (A*STAR), National Metrology Centre (NMC), 1 Science Park Drive, Singapore 118221, Singapore. kai_fuu_ming@nmc.a-star.edu.sg., Tee MH; Singapore-MIT Alliance for Research and Technology (SMART) Centre, 1 CREATE Way, CREATE Tower, #10-01, Singapore 138602, Singapore. minghui1991@hotmail.com., Tan N; Singapore-MIT Alliance for Research and Technology (SMART) Centre, 1 CREATE Way, CREATE Tower, #10-01, Singapore 138602, Singapore. nicholastanyijian@hotmail.com., Hemond HF; Parsons Laboratory, Massachusetts Institute of Technology, Room 48-425, 15 Vassar Street, Cambridge, MA 02139, USA. hfhemond@exchange.mit.edu.
Jazyk: angličtina
Zdroj: Sensors (Basel, Switzerland) [Sensors (Basel)] 2018 Jan 18; Vol. 18 (1). Date of Electronic Publication: 2018 Jan 18.
DOI: 10.3390/s18010265
Abstrakt: Air pollution exposure causes seven million deaths per year, according to the World Health Organization. Possessing knowledge of air quality and sources of air pollution is crucial for managing air pollution and providing early warning so that a swift counteractive response can be carried out. An optical prototype sensor (AtmOptic) capable of scattering and absorbance measurements has been developed to target in situ sensing of fine particulate matter (PM2.5) and volatile organic compounds (VOCs). For particulate matter testing, a test chamber was constructed and the emission of PM2.5 from incense burning inside the chamber was measured using the AtmOptic. The weight of PM2.5 particles was collected and measured with a filter to determine their concentration and the sensor signal-to-concentration correlation. The results of the AtmOptic were also compared and found to trend well with the Dylos DC 1100 Pro air quality monitor. The absorbance spectrum of VOCs emitted from various laboratory chemicals and household products as well as a two chemical mixtures were recorded. The quantification was demonstrated, using toluene as an example, by calibrating the AtmOptic with compressed gas standards containing VOCs at different concentrations. The results demonstrated the sensor capabilities in measuring PM2.5 and volatile organic compounds.
Competing Interests: The authors declare no conflict of interest.
Databáze: MEDLINE
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