Spectroscopy

Vibrational spectroscopy techniques that identify polymers by their characteristic molecular fingerprints. Non-destructive, high-resolution, and widely accessible.

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Raman Spectroscopy

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A non-destructive, high-resolution technique that identifies polymers by their characteristic vibrational fingerprints. Our Raman framework is specifically designed for thermally aged microplastics — particles altered by high-temperature environments like waste-to-energy incineration.

  • Spectral range: 2600–3500 cm⁻¹ (C–H stretching region)
  • Laser wavelength: 532 nm
  • Reference library: 8 polymer types with in-situ spectra from 25°C to 800°C
  • Matching algorithm: Pearson correlation with dual-threshold classification (r ≥ 0.60 → MP; r ≥ 0.75 → classified)
  • Detection limit: ~1 μm spatial resolution
  • Novel concept: "MP Derivative" classification for thermally altered polymers

More spectroscopy techniques (FTIR, LDIR) will be added to this category in future updates.

Try Raman Identification

Upload your Raman spectrum, interactively correct the baseline, then run identification.

Step 1: Click to select or drag and drop your file here

Two-column data (.txt / .csv / .dat / .xlsx): wavenumber (cm-1) • intensity

Important: Baseline correction uses polynomial fitting through user-placed anchor points. Corrected spectrum is then interpolated to 2600-3500 cm-1 for Pearson correlation matching. Thresholds: r ≥ 0.60 → counted as microplastic; r ≥ 0.75 → polymer type classified.