RECENDT GmbH – Laser wavelength Comparison

SERS spectra of Melamine, comparison between 532 and 785 nm laser wavelength measured by Robert Zimmerleiter from RECENDT GmbH

1 ppm

S-Silver hydrophilic


The graphs show spectra of melamine in the aqueous conditions, and the characteristic peak of Melamine measured using both 532 and 785 nm lasers for the measurements on SERSitive S-Silver Substrates

Laser wavelength: 532 and 785 nm
Laser power: 10 mW
Laser spot size: 150-170 µm
Integration time: 1000 ms
Averaging: 10x
Solvent: H2O
Raman Spectrometer: Wasatch Photonics
Lens magnification: No magnification was used, just a regular Raman-Probe
Sampling method: drop: “10µl of analyte were pipetted onto the substrate.”
The substrate used: S-Silver hydrophilic


Measured by:
Dipl.‑Ing. Robert Zimmerleiter
Research Scientist
RECENDT GmbH – Research Center for Non-Destructive Testing GmbH
Science Park 2, Altenberger Strasse 69, 4040 Linz, Austria
Tel.: +43 732-2468-4624