Response to comment on "Solubility Enhancement and Fluorescence Quenching of Pyrene by Humic Substance: The Effects of Dissolved Oxygen on Quenching Processes." (reply to Sarah A. Green and Neil V. Blough in this issue, p. 1407)
Article Abstract:
Environmental factors could not have affected the fluorescence lifetime data in a study of the effects of dissolved oxygen on quenching processes. Small samples made two days ahead of the analysis and stored in the refrigerator negate the theory of undersaturation of dissolved oxygen prior to the experiment or fluctuations in temperature. Temperature-induced changes in the dissolved oxygen concentration, meanwhile, explain the magnitude of variability in the precision of data. The pitfalls of fitting data to the later half of the decay curves are acknowledged.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Association of linear alkylbenzenesulfonates with dissolved humic substances and its effect on bioavailability
Article Abstract:
Fluorescence quenching and ultra-centrifugation techniques were used to determine the association of linear alkylbenzenesulfonates (LAS) with dissolved humic substances (DHS). Both techniques can be used to measure the effects of DHS on the speciation of LAS in natural waters. Toxicity studies which examined the effects of DHS on the bioavailability to the fathead minnow Pimephales promelas indicated that DHS can alter the bioavailability of LAS to aquatic organisms.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Solubility enhancement and fluorescence quenching of pyrene by humic substances: the effect of dissolved oxygen on quenching processes
Article Abstract:
Pyrene-humic substance partition coefficients measured by the solubility enhancement (SE) and fluorescence quenching (FQ) techniques were comparatively analyzed. Nonstatic quenching processes were measured using fluorescence lifetime data to determine differences between the SE and FQ methods. The results showed that there was no significant difference between values derived using SE and FQ techniques.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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