1. A. Takaharu, Y. Katsumi, and W. P. Chao, Spectrochim. Acta, A, 75, No. 2, 819–824 (2010).
2. J. H. He, Q. Xu, and Z. R. Song, Metall. Anal., 3, 34–44 (2010).
3. S. Y. Zou, R. Wang, and D. Y. Fu, Chin. Condiment, 9, 89–91 (2012).
4. R. L. Zhou, D. Y. Fu, and D. Yuan, Appl. Chem. Ind., 3, 601–603 (2017).
5. A. N. Zacharia, J. Appl. Spectrosc., 79, No. 6, 949–954 (2013).