A novel method for the determination of Vanadium (V), Iron (Fe), and Nickel (Ni) in petroleum coke by laser-induced breakdown spectroscopy (LIBS) was proposed. Compared with the current common methods for determining elements in petroleum coke, which require a variety of reagents and a longer operation time, the LIBS method has the advantages of simple sample pre-treatment, faster measurement speed, less pollution of the measuring environment, and no reagents consumption. After feature selection of the wavelengths corresponding to V, Fe, and Ni in the LIBS spectrum of petroleum coke, the element contents of the test set were predicted after SVR modelling for the three elements in the training set. The results of root-mean-square error of predictions (RMSEP) for V, Fe and Ni were 36.4 mg/kg, 36.04 mg/kg and 14.94 mg/kg. The RMSEP of V and Ni were close to the reproducibility (accuracy) of element measurements (32 mg/kg and 14 mg/kg) using the wavelength dispersive X-ray fluorescence spectroscopy (WD-XFS) method in ASTM D6376–10 standard. This work demonstrated that this LIBS-based petroleum coke element quantitative analysis method, which was used for the first time, can be applied to the rapid detection of the petroleum coke industry.

提出了一种用激光诱导击穿光谱法（LIBS）测定石油焦中钒（V），铁（Fe）和镍（Ni）的新方法。与目前需要多种试剂并需要更长操作时间的石油焦中常见元素测定方法相比，LIBS方法具有样品前处理简单，测量速度快，测量环境污染少和操作简便等优点。无试剂消耗。在对石油焦的LIBS光谱中的V，Fe和Ni的波长进行特征选择后，通过对训练集中的三个元素进行SVR建模，预测了测试集的元素含量。V，Fe和Ni的预测均方根误差（RMSEP）结果为36.4 mg / kg，36.04 mg / kg和14.94 mg / kg。V和Ni的RMSEP接近于使用ASTM D6376-10标准中的波长色散X射线荧光光谱法（WD-XFS）进行元素测量的可重复性（准确性）（32 mg / kg和14 mg / kg）。这项工作表明，这种首次使用的基于LIBS的石油焦元素定量分析方法可用于石油焦行业的快速检测。