Free hydroxycinnamic acids, lycopene, and color parameters in tomato cultivars

Marcos Hernández1, Elena Rodríguez, Carlos Díaz

  • 1Food Science and Nutrition Area, Department of Analytical Chemistry, Food Science and Nutrition, University of La Laguna, Avenida Astrofísico Sánchez s/n, 38201 La Laguna, Santa Cruz de Tenerife, Spain.

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UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...