Determination of Environmental Pollutants by Direct Fluorescence Spectroscopy

Østgaard, Kjetill

doi:10.1016/b978-0-12-682103-1.50012-5

Cited by 5 publications

(1 citation statement)

References 59 publications

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“…Fiber-optic sensors and laser-induced fluorescence (LIF) spectroscopy have drawn considerable interest in remote sensing of various environmental pollutants in air, water and soil [1][2][3][4]. In this context, time-integrated detection of LIF-intensities seems to be a very attractive procedure for screening applications since the ratios of "late" and "early" fluorescence intensities depend sensitively on the concentration of oil in a polluted water or soil sample [4,5].…”

Section: Introductionmentioning

confidence: 99%

Laser-based detection of PAHs and BTXE-aromatics in oil polluted soil samples

Bublitz

Christophersen

Schade

1996

Analytical and Bioanalytical Chemistry

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Time-resolved laser-induced fluorescence spectroscopy and fiber optics are applied for the detection of aromatic hydrocarbons in oil contaminated water and soil samples. Time-integrated data accumulation of fluorescence intensities in an "early" and in a "late" time window with respect to the exciting laser pulse simplifies the method in such a way that it becomes very attractive for practical applications. For ultraviolet laser excitation at 337 nm and recording fluorescence signals at 400 nm, typical detection limits of the present set-up are 0.5 mg engine oil/L in water and 5 mg engine oil/kg in soil. A discrimination between BTXE-aromatics and PAHs in oil polluted soil or water samples is possible, when more than one laser wavelength in the ultraviolet is used for the excitation. The possibilities for a thermal discrimination between different aromatics are also discussed.

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Section: Introductionmentioning

confidence: 99%

Laser-based detection of PAHs and BTXE-aromatics in oil polluted soil samples

Bublitz

Christophersen

Schade

1996

Analytical and Bioanalytical Chemistry

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Short-term effect of microencapsulated hydrocarbons on shell growth of Mytilus edulis

1986

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Fluorescence spectroscopy of polynuclear aromatic compounds in environmental monitoring

1995

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The occurrence of polynuclear aromatic compounds (PAC) in the environment and experimental techniques suitable for the detection of PAC in environmental compartments are briefly reviewed. The specific requirements for on-site andin situ environmental analysis are outlined. Particular emphasis is given to fluorescence spectroscopic techniques for the investigation of humic acid- and soil-containing samples. Some examples of studies in the literature on Shpol'skii and jet spectroscopy and on laser-induced fluorescence (OF) measurements of PAC and mineral oils are highlighted. Contaminants in the environment are usually encountered as multicomponent mixtures in very complex matrices. Total fluorescence analysis in combination with the chemometrical technique of rank annihilation factor analysis (RAFA) was employed for the evaluation of a six-component PAC mixture in toluene. It was shown that even in the presence of strong spectral overlap the qualitative identification of all compounds and the reliable quantification of five substances was possible. Results are presented from our stationary and time-resolved fluorescence investigations of the interactions between pyrene and humic acid in water. The Stern-Volmer analysis showed a significant effect of pH on the static quenching efficiency which can be explained by the pH-dependent macromolecular structure of humic acids. Preliminary results from studies of the deactivation of triplet PAC and quenching of delayed fluorescence by humic acid are reported. LIF measurements of mineral oils directly from soil surfaces and of a model oil in a soil column were performed with a fiber-optic coupled multichannel spectrometer. The fluorescence intensity/ concentration relationships were established for a crude and a fuel oil; the corresponding lower limits of detection (LOD) were determined to be 0.025 and 0.125% m/m (mass/mass percentages). These detection limits are compared with realistic oil contaminations of soils. In a soil column designed to mimic fixed-bed bioreactors the distributions of fluorescence signal intensities from a perylene-doped model oil before and after water flooding were determined. These results fromin situ measurements can provide a quantitative basis for the modelling of temporal and spatial contaminants' distributions in reactor design.

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Determination of Environmental Pollutants by Direct Fluorescence Spectroscopy

Cited by 5 publications

References 59 publications

Laser-based detection of PAHs and BTXE-aromatics in oil polluted soil samples

Laser-based detection of PAHs and BTXE-aromatics in oil polluted soil samples

Short-term effect of microencapsulated hydrocarbons on shell growth of Mytilus edulis

Fluorescence spectroscopy of polynuclear aromatic compounds in environmental monitoring

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