[1] [1] J. Shen, J. Z. Xu, J. H. Hu and H. B. Qu, “Determination of tannins in Radix Salvia Miltiorrhiza with phosphomolybdium tungstic acid-casein reaction,” Chin. J. Analytical Chem. 36 (4), 553–555 (2008). Google Scholar

[2] [2] T. Q. Li, “Avoiding adverse drug reactions to Chinese medicine injections,” J. Evid-Based Med. 3 (1), 44–49 (2010).

[3] [3] S. Laxman, P. Bala, P. Nancy, “Quantitative HPLC analysis of ascorbic acid and gallic acid in phyllanthus emblica,” J. Anal. Bioanal. Techniques 1 (3), 1–4 (2010). Google Scholar

[4] [4] T. M. Wang, X. L. Sun, X. Peng, Z. Chu, H. Zhang, T. Kang, H. Chen, “Determination of total tanins in the roots, branches, leaves and pericarps of Juglans mand shuurica,” Chin. J. Chin. Mater. Med. 36 (1), 32–36 (2011). Google Scholar

[5] [5] W. H. Fuang, X. M. Zhang, X. M. Wang, C. H. Ouyang, T. Shu, Z. J. Xie, Z. X. Zhang, “Determination of hydrolyzed gallic acid content in potentilla chinensis ser by HPLC,” Biomed. Res. 26 (1), 99–102 (2015). Google Scholar

[6] [6] The State Pharmacopeia Commission of China. Pharmacopeia of the People’s Republic of China (Part Four), Vol. 203, China Medical Science Press, Beijing (2015), p. 323. Google Scholar

[7] [7] W. F. Zhang, X. Q. Zhang, F. J. Chen, J. F. Shen, “Use of modified casein method for Radix Salvia Miltiorrhiza injection to achieve tannin content control,” Chin. J. Med. Active Plants 7 (29), 644–646 (2012). Google Scholar

[8] [8] X. C. Gong, Y. Li, H. B. Qu, “Removing tannins from medicinal plant extracts using an alkaline ethanol precipitation process: A case study of Danshen injection,” Molecules 19, 18705–18720 (2014).

[9] [9] W. L. Li, H. B. Qu, “Characterization of herbal powder blends homogeneity using near-infrared spectroscopy,” J. Innov. Opt. Health Sci. 7 (6), 1–7 (2014). Link, Google Scholar

[10] [10] W. L. Li, H. B. Qu, “Wavelet-based classification and influence matrix analysis method for the fast discrimination of Chinese herbal medicines according to the geographical origins with near infrared spectroscopy,” J. Innov. Opt. Health Sci. 7 (4), 1–11 (2014). Link, Google Scholar

[11] [11] X. Zhang, Y. Q. Gu, H. Y. Chen, “Synthesis of biocompatible near infrared fluorescence Ag2S quantum dot and its application in bioimaging,” J. Innov. Opt. Health Sci. 7 (3), 1–7 (2014). Link, Google Scholar

[12] [12] Y. T. Huang, P. C. Chen, R. L. C. Chen and T. J. Cheng, “Sequential determination of tannin and total amino acid contents in tea for taste assessment by a fluorescent flow-injection analytical system,” Food Chem. 118, 876–881 (2010).

[13] [13] L. H. Xing, J. Z. Xu, H. B. Qu, “Rapid near-infrared spectroscopy determination of tannins in the alcoholic-precipitation process of Radix Salviae Miltiorrhizae,” Chin. J. Pharm. Anal. 30 (10), 1813–1816 (2010). Google Scholar

[14] [14] H. G. A. Gaber, B. L. Rosana, A. G. C. Josefa, A. G. C. Josefa, E. D. G. Marta, “Fluorescent carbon nanodots for sensitive and selective detection of tannic acid in wines,” Talanta 132, 252–257 (2015).

[15] [15] Y. Shi, L. Yang, J. Zhu, S. Liu, M. Qiao, R. Duan, X. Hu, “Resonance Rayleigh scattering technique for simple and sensitive analysis of tannic acid with carbon dots,” Spectrochim. Acta A Mol. Biomol. Spectrosc. 173, 817–821 (2017).

[16] [16] G. S. S. Fernanda, K. C. S. Greicy, Y. N. Sakae, C. S. L. Rita, S. D. Flávio, “Self-powered sensor for tannic acid exploiting visible LED light as excitation source,” Electrochimica Acta 274, 67–73 (2018).

[17] [17] Y. L. Jia, S. W. Leung, M. Y. Lee, G. Z. Cui, X. H. Huang, F. H. Pan, “The Efficacy of Guanxinning injection in treating angina pectoris: Systematic review and meta-analysis of randomized controlled trials,” Evid-Based Complement. Alternat. Med. 1, 1–16 (2013). Google Scholar

[18] [18] H. X. Huang, H. B. Qu, “In-situ monitoring of saccharides removal of alcohol precipitation using near-infrared spectroscopy,” J. Innov. Opt. Health Sci. 11 (6), 1850027–1–12 (2018). Link, Google Scholar

[19] [19] Z. Zhu, Y. Wang, W. Liao, D. Wang, “Effect of various Danshen injections on patients with coronary heart disease after percutaneous coronary intervention,” Medicine 97 (24), e11062 (2018).

[20] [20] H. X. Huang, H. B. Qu, “A comparative fingerprint study using highperformance liquid chromatography, ultraviolet, and near-infrared spectroscopy to evaluate the quality consistency of Danshen injections produced by different manufacturers,” Anal. Methods 5, 474–482 (2013).

[21] [21] T. N. Phan, K. Martin, “Comparison of random forest, kk -nearest neighbor, and support vector machine classifiers for land cover classification using sentinel-2 imagery,” Sensors 18, 1–20 (2018).

[22] [22] R. N. M. Páscoa, J. A. Lopes, J. L. F. C. Lima, “In situ near infrared monitoring of activated dairy sludge wastewater treatment processes,” J. Near Infrared Spectrosc. 16 (4), 409–419 (2008).

[23] [23] R. Rosipal, N. Kramer, Overview and Recent Advances in Partial Least Squares, Lecture Notes in Computer Science, Springer-Verlag, Berlin (2006), pp. 34–51.