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Application of the Long-Term Delayed Luminescence for Study of Natural Water Environments

Z. Prokowski,L. Mielnik

Published 2012 in Unknown venue

ABSTRACT

A part of photon energy absorbed by a photosynthetic apparatus of photosynthetic organisms and some organic compounds in water or bottom sediments is wasted for luminescence. Depending on the period elapsing from the exposure of the material until registration of its luminescence we may distinguish fluorescence (Fl) registered during exposure of the material to light and delayed luminescence (DL) registered in darkness some time after the exposure to light is terminated. Despite the fact that the quantity of energy lost due to luminescence is not major, it provides important information, since it reflects processes related to the absorption of light, intramolecular energy transfer and structural changes in a given material. For technical reasons, fluorescence and constituent parts of long-term DL registered t > 0.1 s after excitation are the most suitable for registration. Findings obtained so far suggest that using DL for testing water environments creates opportunities for developing fast and accurate luminescence assessment methods for photosynthetic properties of active algae cells and properties of bottom sediments.

PUBLICATION RECORD

  • Publication year

    2012

  • Venue

    Unknown venue

  • Publication date

    2012-03-23

  • Fields of study

    Chemistry, Environmental Science

  • Identifiers
    DOI 10.5772/28478
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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