Raman spectrum:
In addition, since in Raman spectrum we measure the shifts in the frequencies rather than the frequencies themselves it makes regions below 600 cm-1 accessible that otherwise cannot be explored in IR spectroscopy. This characteristic is quite significant for analysing inorganic samples especially the coordination compounds since the metal - ligand bonds commonly absorb in this region. As water does not scatter much, Raman spectroscopy could be used to measure species dissolved or suspended in aqueous solutions. This opens up the field for inorganic species.
Because of the remote non-invasive sampling, minimal sample preparation needs and tolerance of water, Raman spectroscopy is starting to play an important role in environmental analysis. The current environmental applications apply majorly to the heavily contaminated situations it is expected which in with newer sampling technologies Raman spectroscopy might soon be more applicable to the analysis of potable water, within remote sensing and in analysis of gaseous pollutants.