Raman Concatenation involves sequentially collecting Raman spectra from two NIR lasers with one Raman spectrometer and one Raman probe. m-oem, the Metrohm OEM brand, is pleased to present this exciting new technique that enables fluorescence-free spectra of the fingerprint and stretching region with increased sensitivity and discrimination. Visitors of this year’s Analytica show in Munich are welcome to learn more about this technique, its benefits, and possible applications at the m-oem booth in hall A2 at booth 522.

  • Moisture determination: Raman Concatenation expands the number of samples that can be identified and provides enhanced information about the sample. Specifically, water information from the stretching region is now available for moisture analysis and referencing. Water band stretches are used to calculate loss-on-drying for lyophilization and determine the expansion and concentration of hydrogels.
  • Biodiesel/Petrochemical analysis: Raman Concatenation has been successfully used for biodiesel fuels and petrochemical applications in cases where visible and NIR Raman spectra are overwhelmed by fluorescence.
  • Food analysis: Raman Concatenation has also been successfully applied to food analysis, where dyes and pigments can overwhelm the Raman spectrum in samples such as sweets and baked items.

Raman concatenation saves time and increases sensitivity and the discrimination power. One spectrometer and probe are incorporated into one sequential measurement, and the light can be focused on the same portion of the sample. While dampening fluorescence, an improvement of sensitivity and selectivity is demonstrated.

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