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- Title
Fluorescence characteristics of petroleum ether and its olive oil solution.
- Authors
ZHAO Zhi; ZHONG Xianqiong; ZOU Yikai
- Abstract
To explore whether petroleum ether (PE) emits fluorescence or not and whether its residual in olive oil (OL) can be detected by fluorescence method or not, the fluorescence characteristics of PE and its composition with OL at different proportions were experimentally investigated by adopting fluorometry. The results show that PE exists fluorescence which consists of UV spectral region 320 nm ~ 380 nm and purple-green spectral region 380 nm ~ 520 nm. At the excitation region 240 nm ~ 300 nm, the intensity of the two spectra increases with increase of excitation wavelength, but the first spectral region is stronger. At the excitation wavelength of 305 nm, the first spectral region begins to weaken. When the excitation wavelength is larger than 320 nm, the UV spectral region weakens and disappears quickly, while the second region continues to increase with increase of excitation wavelength. When the excitation wavelength increases to 360 nm, the second spectrum becomes the strongest. When the excitation wavelength is larger than 360 nm, the fluorescence weakens. Addition of small amount of PE into OL can enhance the OL characteristic peaks and even lead to appearance of the red-shifted characteristic peak 405 nm of PE, which can be utilized to detect PE residual in OL. The volume fraction limit of detection of PE in OL can reach 0.059, 0.048, and 0.043 for the excitation wavelength 320 nm, 340 nm, and 360 nm, respectively. This work expands the research of PE to fluorescence and fluorescence detection of PE residual in OL.
- Publication
Laser Technology, 2023, Vol 47, Issue 4, p553
- ISSN
1001-3806
- Publication type
Article
- DOI
10.7510/jgjs.issn.1001-3806.2023.04.017