Category : Spectroscopy, colorimetry, photometry, fluometry > Raman spectroscopy

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Targeted Ultraviolet Chemical Sensors (TUCS) are in-situ, non-contact, non-invasive, non-destructive sensors that require no sample handling or preparation. They employ UV laser induced native fluorescence and resonance Raman spectroscopy to detect and classify unknown molecules and molecular structures. By employing deep UV excitation wavelengths the need for tagging target materials with dyes is eliminated. Dye tags are a significant source of error in many measurements and can obscure the chemistry being measured. Using excitation wavelengths below 250nm, native or endogenous fluorescence and UV Raman emission of target molecules can be measured simultaneously without mutual interference.

Sensitivity and Specificity
Fluorescence Limit of Detection of this sensor is as low as one microorganism at a working distance of 45cm or 100 TRP molecules at a distance of 4cm. Other organic molecules such as BTEX have sensitivity in the PPT range. Resonance Raman sensitivity is about 1000 times lower. Specificity will be discussed later.

Applications
TUCS are designed to be employed as sensitive, in situ, autonomous, industrial or environmental monitors. The sensors developed by Photon Systems operate in the deep ultraviolet to enhance their sensitivity and specificity in identifying certain molecular structures such as organic molecules and well as other molecules that are optimally excited in the UV to emit fluorescence and Raman.

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List of all articles in this sub-category Raman spectroscopy

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