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Effects of Light in Everyday Life Monitored by Electron Paramagnetic Resonance (EPR) Spectroscopy



  March 19, 2019

  8:00 a.m. PDT / 11:00 a.m. EDT / 15:00 GMT / 16:00 CET




Photochemistry plays an important role in many chemical processes. Irradiating a sample with a suitable wavelength of light often results in free radicals, radical pairs, excited states, and changes of oxidation state.

Electron Paramagnetic Resonance (EPR) is the best technique for shedding light on these reactions and processes because of its unique ability to unambiguously detect paramagnetic species in a direct and non-intrusive manner.

EPR identifies the reaction intermediates as well as quantifies their concentrations, thus elucidating the reaction mechanisms and kinetics of photochemical reactions. It can be applied to samples in gaseous, liquid or sold states over a wide range of temperatures.

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Key Learning Objectives

    Various applications of EPR spectroscopy in the field of photochemistry:

  • Measuring the extent of photodegradation after light exposure with EPR in polymers, food and beverages, pharmaceuticals, health care products, paint, environmental pollutants, etc.
  • Monitoring photochemical (photocatalysis and photopolymerization) reactions for understanding electron transfer mechanisms using EPR
  • Photoaging and reactive oxygen species detection by EPR: impact on human health

Who Should Attend

  • General and R&D managers involved in QC/QA of product degradation, environment protection
  • Academics who do photochemical research or collaborate with companies to study photochemical processes
  • Researchers who study the effect of photodegradation reactions on human health


Dr. Ralph Weber,
Senior EPR Applications Scientist,
Bruker BioSpin
Dr. Kalina Ranguelova,
Senior EPR Applications Scientist,
Bruker BioSpin


Alexandra Taylor
Assistant Editor,