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Cobalt’s technologies use the powerful analytical technique of Raman spectroscopy to determine the composition of chemical mixtures. In diffusely scattering samples such as powders or tablets conventional Raman tends to be limited to surface or near-surface measurements. Cobalt’s innovations promote measurement into the bulk of objects, often extending the analysis through diffuse samples to many millimetres or centimetres of depth and applying the advantages of Raman to sub-surface analysis.
Compared to other optical techniques, such as UV/VIS and near Infra-Red (NIR) spectroscopy, Raman spectra are feature-rich and offer a high chemical specificity. Physical changes, such as changes in crystal structure, or polymorph form are also detectable. In contrast with mid-IR and terahertz spectroscopy it is also notable for its compatibility with water-containing systems.
Cobalt’s variations on Raman spectroscopy extend the measurement depths to many millimetres or even centimetres by using the scattering properties of opaque materials. It also allows overlying materials to be excluded from the analysis – enabling, for example, the contents of opaque plastic bottles to be measured without touching the container.