| 光谱学与光谱分析 |
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| Characterization of Time-Resolved Laser-Induced Fluorescence from Crude Oil Samples |
| LIU De-qing1, LUAN Xiao-ning1, HAN Xiao-shuang1, GUO Jin-jia1, AN Ju-bai2, ZHENG Rong-er1* |
1. Optics and Optoelectronics Laboratory, Ocean University of China, Qingdao 266100, China
2. Information Science & Technology College, Dalian Maritime University, Dalian 116026, China |
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Abstract To evaluate the feasibility of laser induced time-resolved fluorescence technique for in-situ detection of underwater suspended oil spill, extensive investigations have been carried out with different densities of crude oil samples from six different wells of Shengli Oilfield in this work. It was found that the fluorescence emission durations of these crude oil samples were almost the same, the Gate Pulse Delay of DDG (Digital Delay Generator) in the ICCD started at 52ns and ended at 82ns with a width (FWHM) of 10 ns. It appears that the peak location and lifetime of fluorescence for different crude oil samples varied with their densities, and those with similar densities shared a similar lifespan with the closer peak locations of fluorescence. It is also observed that the peak of fluorescence remained the same location before reaching the maximum intensity, subsequently shift to longer wavelength as fluorescence attenuated from maximum intensity with a red shift among 17～30 nm varied with samples. This demonstrated that the decay rate of fluorescent components in the crude oils was different, and energy transfer between these components might exist. It is hoped that those obtained results and characteristics could be the useful information for identification of suspended spilled-oil underwater.
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Received: 2014-05-06
Accepted: 2014-08-10
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Corresponding Authors:
ZHENG Rong-er
E-mail: rzheng@ouc.edu.cn
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