Hidden Isosbestic Point(s) in Ultraviolet Spectra - IMT Mines Alès
Article Dans Une Revue Applied Spectroscopy Année : 2016

Hidden Isosbestic Point(s) in Ultraviolet Spectra

Résumé

The existence of isosbestic point(s) in a set of UV-visible spectra is rarely exploited for quantitative or qualitative information despite its interest. Indeed, the presence of isosbestic points means a quality and quantity conservation in the global composition of samples with a given relation between the concentration of absorbing compounds or mixtures of compounds. However, in some cases, for example, when a dilution occurs, no isosbestic point appears. This work shows that a simple operation, called normalization, can reveal the existence of hidden isosbestic point(s) (IP*). This paper first summarizes the required conditions for the presence of isosbestic points. Second, it demonstrates the significance of IP* revealed by normalization. An example of the exploitation of direct or hidden isosbestic points in the environmental field illustrates the interest in and application of the technique.

Domaines

Chimie
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Dates et versions

hal-04664800 , version 1 (30-07-2024)

Identifiants

Citer

M.-F. Pouët, E. Baures, S. Vaillant, O. Thomas. Hidden Isosbestic Point(s) in Ultraviolet Spectra. Applied Spectroscopy, 2016, 58 (4), pp.486-490. ⟨10.1366/000370204773580365⟩. ⟨hal-04664800⟩
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