A Broadband Mid-Infrared Trace Gas Sensor Using Supercontinuum Light Source: Applications for Real-Time Quality Control for Fruit Storage.
Khalil Eslami JahromiQing PanAmir KhodabakhshCor SikkensPaul AssmanSimona M CristescuPeter M MoselundMaxime JanssensBert E VerlindenFrans J M HarrenPublished in: Sensors (Basel, Switzerland) (2019)
We present a fully integrated and transportable multi-species trace gas sensor based on a mid-infrared (MIR) supercontinuum light source. The high brightness (surpassing synchrotron) and ultra-broad spectral bandwidth (2-4 μm) of this light source allows simultaneous detection of multiple broadband absorbing gas species. High sensitivity in the sub-ppmv level has been achieved by utilizing an astigmatic multipass cell. A grating-based spectrometer at a scanning rate of 20 Hz is developed employing a balanced detection scheme. A multi-component global fitting algorithm is implemented into a central LabVIEW program to perform real-time data analysis. The obtained concentration values are validated by the standard gas chromatography mass spectrometry (GC-MS) method. Field application of the sensor for quality control of stored fruits at a small scale is demonstrated, involving the detection of ethylene, ethanol, ethyl acetate, acetaldehyde, methanol, acetone, and water simultaneously. The sensor also shows promising potentials for other applications, such as environmental monitoring and biomedical research.
Keyphrases
- quality control
- data analysis
- gas chromatography mass spectrometry
- room temperature
- loop mediated isothermal amplification
- high resolution
- label free
- real time pcr
- carbon dioxide
- heavy metals
- cell proliferation
- long non coding rna
- machine learning
- single cell
- optical coherence tomography
- high speed
- cell therapy
- ionic liquid
- magnetic resonance
- magnetic resonance imaging
- human health
- mass spectrometry
- climate change
- solid phase extraction
- genetic diversity