Influence of oil-in-water emulsions on fluorescence properties as observed by excitation-emission spectra

Baszanowska, Emilia; Otremba, Zbigniew; Toczek, Henryk

doi:10.2971/jeos.2013.13069

Cited by 17 publications

(17 citation statements)

References 9 publications

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“…To solve this issue, a key role is played by the specific shape of the fluorescence spectrum of oil. To compare the abovepresented EEMs for oil which was diluted in the solvent (n-hexane) with the EEMs of oil which were emulsified in water, the results of the former measurements already partially discussed by Baszanowska et al [22] were used, i.e. EEMs of water contaminated with the same oil as described above, but in the form of a suspension in clear (demineralized) water.…”

Section: Discussionmentioning

confidence: 99%

“…Those studies relied on an analysis of similarities of fluorescence spectra to define if a type of oil can be distinguished by the shape of the EEM spectra (assuming that a database of the spectra of various oils is available). An attempt to explain this matter involves an Table 2) (redrawn after [22]) Baszanowska and Otremba Journal of the European Optical Society-Rapid Publications (2016) 12:16…”

Section: Discussionmentioning

confidence: 99%

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Fluorometry in application to fingerprint of petroleum products present in the natural waters

Baszanowska

Otremba

2016

J. Eur. Opt. Soc.-Rapid Publ.

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Background: This study analyses the possibility of optical detection of trace amounts of oil in natural waters. Since petroleum and its derivatives induced by ultraviolet light exhibit a high intensity of fluorescence, this phenomenon can be used to detect petroleum products penetrating both the surface and subsurface waters. The challenge is to discriminate the fluorescence signal originating from petroleum substances from the total signal originating from both petroleum products and the natural substances. Results: Issues connected with fluorescence methods of detection of oil substances diffused in aquatic environment are analysed. Based on fluorescence spectroscopy, fluorometric indices of petroleum products for two forms (dissolved in n-hexane and dispersed in water) are discussed. The excitationemission spectra (EEMs) were determined in the range of excitation wavelengths 240-450 nm and 270-600 nm for emission. Selected parameters of oil fingerprinting are discussed: similarity ratio, intensity ratio and wavelength-independent fluorescence peaks (Ex max /Em max ). The latter was compared with the typical fluorescing natural marine residues. Conclusions: The results indicate that Ex max /Em max and intensity ratio appear to be efficient indices for the discrimination of oil pollution from autochthonous seawater fluorescent substances.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Fluorometry in application to fingerprint of petroleum products present in the natural waters

Baszanowska

Otremba

2016

J. Eur. Opt. Soc.-Rapid Publ.

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“…The fluorescence spectra of the excited sample are received at the 90° geometric direction of the sample pool. The emission monochromator is used to measure the fluorescence intensity of the substance at different wavelengths by scanning, and the excitation emission spectrum signals of the sample, which is in the microchannel, converge by the spectral focusing system. Finally, the fluorescence spectra of the samples are obtained using the photoelectric detection system.…”

Section: Optical Path Structure Of Quartz Glass Microchannel Sample Cellmentioning

confidence: 99%

Using femtosecond laser processing quartz glass microchannel sample cell

Wang

Liu

Huo

et al. 2019

Micro & Optical Tech Letters

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To improve the intensity and reliability of the emission fluorescence spectrum signal of petroleum pollutant samples, we designed multiple microchannel sample pools to replace traditional sample pool with square section. First, the microchannel structure of the sample pool was designed. Second, we analyzed the pulse intensity distribution and laser ablation volume (LAV) of a femtosecond laser. Then, based on the LAV, we tested the oblique motion of the laser focus at a 45° angle combined with the change in laser power, ablated a specific length region on the quartz glass surface, and indirectly determined the processed depth of the hole inside the quartz glass. Finally, using quartz glasses of 2, 5, and 10 mm in thickness as substrates, we separately varied the processing speed in the x‐direction, feed rate in the y‐direction, and laser output power of the laser processing platform, and obtained the shape‐structure of the microchannel inside the quartz glass under different processing parameter combinations. The experimental results demonstrate that the proposed method is effective at processing a specific hole depth inside the quartz glass. Experiments show that the sample cell can be used for comparative detection of fluorescence signals.

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“…Oils, when dissolved in non-fluorescing solvents (e.g., n-hexane), produce a characteristic fluorescence spectra, which enable recognizing the type of oil [10,11]. An analogous effect was found for oil-in-water emulsion [12,13], as well as the abovementioned effect of water in contact with oil. However, although the solubility of oil in water is low [14], the presence of a petroleum substance in seawater is significant enough that it is manifested in the fluorescence spectra.…”

Section: Introductionmentioning

confidence: 97%

Fluorometric Index for Sensing Oil in the Sea Environment

Baszanowska

Otremba

2017

Sensors

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Excitation-emission matrix spectroscopy (EEMS) was applied to determine the fluorometric index (FI) as a parameter indicating the presence of a source of oil pollution in a specific area of the sea. Seawater from the Polish coast (the Baltic Sea) and the same water combined with various amounts of crude oil extracted from the Baltic Sea shelf (Petrobaltic-type oil) were used in this study. The FI values were calculated for excitation and emission wavelengths found at the maximal peak, taking into account the natural seawater and the seawater artificially contaminated (for an oil-to-water ratio range of 0.5 × 10−6 − 500 × 10−6). The wavelength configurations (Ex/Em) (225/355 and 225/340) for the FI index were applied. It was found that, independent of the amount of oil, the FI achieves a higher value for natural seawater than for seawater that has had contact with oil. These results provide the basis to design a sensor signaling the appearance of oil in a defined sea area.

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Influence of oil-in-water emulsions on fluorescence properties as observed by excitation-emission spectra

Cited by 17 publications

References 9 publications

Fluorometry in application to fingerprint of petroleum products present in the natural waters

Fluorometry in application to fingerprint of petroleum products present in the natural waters

Using femtosecond laser processing quartz glass microchannel sample cell

Fluorometric Index for Sensing Oil in the Sea Environment

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