Correction method of the fluorescence intensity of petroleum hydrocarbons in different soil types based on resonance scattering spectroscopy

Jinqiang Yang; Ruifang Yang; Nanjing Zhao; Gaoyong Shi; Wenqing Liu

doi:10.1016/j.saa.2023.123174

Correction method of the fluorescence intensity of petroleum hydrocarbons in different soil types based on resonance scattering spectroscopy

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 15:303:123174. doi: 10.1016/j.saa.2023.123174. Epub 2023 Jul 20.

Authors

Jinqiang Yang¹, Ruifang Yang², Nanjing Zhao³, Gaoyong Shi¹, Wenqing Liu⁴

Affiliations

¹ Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China/PR China; University of Science and Technology of China, Hefei 230026, Anhui, China/PR China; Key Laboratory of Optical Monitoring Technology for Environment of Anhui Province, Hefei 230031, Anhui, China.
² Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China/PR China; Key Laboratory of Optical Monitoring Technology for Environment of Anhui Province, Hefei 230031, Anhui, China. Electronic address: rfyang@aiofm.ac.cn.
³ Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China/PR China; Key Laboratory of Optical Monitoring Technology for Environment of Anhui Province, Hefei 230031, Anhui, China. Electronic address: njzhao@aiofm.ac.cn.
⁴ Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China/PR China; Key Laboratory of Optical Monitoring Technology for Environment of Anhui Province, Hefei 230031, Anhui, China.

PMID: 37517270
DOI: 10.1016/j.saa.2023.123174

Abstract

Soil types has an obvious impact influence on the fluorescence intensity of soil petroleum hydrocarbons. To reduce the interference caused by soil types, this paper proposes a calibration method using resonance scattering spectroscopy. To establish the correction method, 100 g/kg crude oil samples from six soil types were prepared. The mission and resonance scattering spectrum under 280 nm excitation were measured for all samples. The results showed that the fluorescence spectra and resonance scattering spectra of soil crude oil vary with different soil types. And the fluorescence peak intensity and the resonance scattering peak intensity at 360 nm of soil petroleum hydrocarbons are highly correlated in different soil types. The fluorescence peak intensity at 360 nm was divided by the resonance scattering light intensity at 360 nm to obtain the corrected fluorescence intensity, which can effectively reduce the influence of soil type on fluorescence intensity. The feasibility of correction method was further verified for different types and concentrations of soil crude oil. The results showed better linearity between the fluorescence intensity and the concentration of Petroleum Hydrocarbons after the correction (with a correlation coefficient R² of 0.96) than before the correction (with R² of 0.72), the mean relative prediction error of all samples decreased from 31.92 % to 4.71 % after correction. The research can provide theoretical basis and technical support for the accurate and rapid detection of Petroleum Hydrocarbons in soil by fluorescence spectroscopy.

Keywords: Correction; Fluorescence spectroscopy; Petroleum Hydrocarbons; Resonance scattering spectroscopy; Soil.