Typically, Raman spectroscopy, a technique based on the photon scattering phenomenon, is used in chemistry to obtain structural “fingerprints” by which molecules can be identified. Raman spectroscopy is highly sensitive to the chemical composition and structure of the sample, so it can be used to detect a wide variety of compounds in samples, such as alcohol, drugs, toxic substances.
Researchers from Tomsk State University have developed special software that allows them to select the desired components with high accuracy using Raman spectroscopy. The researchers experimented with the blood of five anonymous donors. All samples were applied to one of five substrates: aluminum tape, white cotton fabric, white polyester fabric, blue polyester fabric, and denim allowed to dry overnight. The new method made it possible to detect biomaterials even in small contents – picograms (a trillionth of a gram) or femtoliter, the researchers stressed in a comment to Interfax.
Source: Ferra
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