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• W4213048597 endingPage "106388" @default.
• W4213048597 startingPage "106388" @default.
• W4213048597 abstract "The concentrations of Vanadium (V), Sodium (Na), and Calcium (Ca) have a great effect on the quality of petroleum coke. In this work, the trace elements of V, Na, and Ca in petroleum coke were determined by laser-induced breakdown spectroscopy (LIBS). First, petroleum coke powder was mixed with the stearic acid binder and pressed into pellets to achieve a high signal repeatability. Then, to optimize the percentage of the binder in the pressed pellets, the influence of stearic acid on LIBS signal was studied in detail. When the stearic accounted for 30 w% in the mixed-pressed pellets, the plasma morphology and spectral signal were more stable. Finally, the linear calibration curves were plotted by fitting the emission line intensities and the element concentrations. In addition, the results achieved through this method were compared with other conventional methods. The determination coefficients of calibration curves of V, Na, and Ca elements all exceed 0.99. The relative standard deviations of the predicted values of V, Na, and Ca concentrations were 3.65%, 4.38%, and 5.53%, respectively. We also calculated the limit of detection of the V, Na, and Ca elements, which were 1.19 mg/kg, 0.41 mg/kg, and 0.51 mg/kg, respectively. The experimental results demonstrate that LIBS detection is an accurate and precision method for the determination of trace elements in petroleum coke. The RSD of the emission line intensities as a function of different percentages of the stearic acid binder. • The percentage of stearic acid binder in petroleum coke was optimized and a high signal repeatability was achieved. • The fluctuation of the plasma morphology was quantitatively investigated by statistical analysis of ICCD pixels intensities. • LIBS detection can be exploited in the field of online analysis of trace elements in petroleum coke." @default.
• W4213048597 created "2022-02-24" @default.
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• W4213048597 date "2022-04-01" @default.
• W4213048597 modified "2023-10-16" @default.
• W4213048597 title "Quantitative analysis of trace elements (vanadium, sodium, and calcium) in petroleum coke using laser-induced breakdown spectroscopy with binder" @default.
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• W4213048597 doi "https://doi.org/10.1016/j.sab.2022.106388" @default.
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