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Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for electronic transitions. As a result...

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Related Experiment Video

Updated: Jul 8, 2026

UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media

UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media

Published on: October 25, 2021

Nondestructive varnish identification by ultraviolet fluorescence spectroscopy.

Mathieu Thoury¹, Mady Elias, Jean Marc Frigerio

¹Institut des Nano-Sciences de Paris, UMR 7588 CNRS, Université Pierre et Marie Curie, Campus Boucicaut, 140 rue de Lourmel 75015 Paris, France.

Applied Spectroscopy

|January 17, 2008

Summary

Art restorers can now identify varnish types non-destructively using ultraviolet (UV) fluorescence spectroscopy. This real-time, in situ method aids in selecting appropriate solvents for conservation, improving art preservation techniques.

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Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks

Published on: May 8, 2015

Area of Science:

Art conservation science
Analytical chemistry
Spectroscopy

Background:

Accurate varnish identification is crucial for art restorers to select appropriate solvents for conservation treatments.
Traditional chemical analysis requires sampling, which can be invasive and time-consuming.
Developing non-destructive, in situ methods is essential for preserving delicate artworks.

Purpose of the Study:

To introduce and validate ultraviolet (UV) fluorescence spectroscopy as a novel, non-destructive technique for identifying varnish composition.
To enable real-time, in situ analysis of varnishes on artworks.
To provide art conservators with a tool for informed solvent selection.

Main Methods:

Utilized ultraviolet (UV) fluorescence spectroscopy for varnish analysis.
Compared emission spectra of unknown varnishes with reference samples (fresh, aged, natural resins).
Employed monochromatic excitation wavelengths to differentiate varnish types (spirit, oil, mixed).

Main Results:

UV fluorescence spectroscopy successfully differentiated between various resin and varnish types.
The method proved effective for both artificial and naturally aged samples.
Successful application demonstrated on real works of art and samples on fluorescent backgrounds.

Conclusions:

Ultraviolet (UV) fluorescence spectroscopy is a viable, non-destructive technique for in situ varnish identification in art conservation.
This method allows for rapid, real-time analysis, aiding conservators in choosing correct solvents.
The technique enhances the ability to preserve cultural heritage by informing conservation decisions.