Figure-of-Merit Characterization of Hydrogen-Bond Acidic Sorbents for Waveguide-Enhanced Raman Spectroscopy.
Nathan F TyndallTodd H StievaterDmitry A KozakMarcel W PruessnerBrian J RoxworthyWilliam S RabinovichCourtney A RobertsR Andrew McGillBenjamin L MillerEthan LutaMatthew Z YatesPublished in: ACS sensors (2020)
The optical properties of several hydrogen-bond acidic sorbent materials are evaluated in situ to assess their suitability for waveguide-enhanced Raman spectroscopy (WERS) of vapor-phase organophosphonates. A number of characteristics critical to WERS are evaluated for each sorbent: infrared absorption, Raman spectral background, and the limit of detection for a test hydrogen-bond-basic analyte (dimethyl methylphosphonate, DMMP). We describe the chemical properties of the sorbents that differentiate their optical properties for sensing. Then, we introduce a sorbent figure-of-merit that quantifies these differences and provides a framework to assess the quality of newly developed sorbent materials.
Keyphrases
- raman spectroscopy
- solid phase extraction
- molecularly imprinted
- simultaneous determination
- tandem mass spectrometry
- liquid chromatography
- gas chromatography
- metal organic framework
- ionic liquid
- visible light
- magnetic resonance
- optical coherence tomography
- mass spectrometry
- quality improvement
- high resolution
- computed tomography
- real time pcr