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Orthogonal projection (OP) technique applied to pattern recognition of fingerprints of the herbal medicine houttuynia cordata Thunb. and its final injection products

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Abstract

It is a crucial issue to determine the origins of herbal medicinal materials and identify the quality grades and fakes of their final products collected from different pharmaceutical corporations. Pattern recognition technique may assist the manufacturers to achieve this purpose and effectively control the quality of their products. In this work, a widely used method in chemometrics, orthogonal projection (OP) technique, was applied to discrimination analysis and identification of fingerprints of the herbal medicine houttuynia cordata Thunb. (HCT) and its final injection products. The advantages of the OP technique are clearly shown after comparing with the conventional methods such as principal component analysis (PCA), Mahalanobis distance (MD), and similarity comparison method (SCM). Three different sources of medicinal material HCT and its final injection products from six different manufacturers were studied under ‘sixfold’, ‘threefold’ and ‘threefold-bis’ cross-validation procedures. The good performance of the proposed method in determination and identification of unknown samples shows it could be a powerful tool for quality control in herbal medicine production and other related research fields.

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Acknowledgements

National Natural Science Foundation of P. R. China (Grant numbers 20235020 and 20475066) and University Grant Council (UGC) of Hong Kong SAR (Area of Excellent Project “Chinese Medicine Research and Further Development”) are thanked for financial supports.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering Research Center of Modernization of Chinese Medicines, Central South University, Changsha, 410083, People’s Republic of China

    Zhong-Da Zeng, Yi-Zeng Liang, Ting Zhang & Ya-Li Wang

  2. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

    Foo-Tim Chau

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  1. Zhong-Da Zeng
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  2. Yi-Zeng Liang
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  3. Ting Zhang
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Correspondence to Yi-Zeng Liang.

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Zeng, ZD., Liang, YZ., Zhang, T. et al. Orthogonal projection (OP) technique applied to pattern recognition of fingerprints of the herbal medicine houttuynia cordata Thunb. and its final injection products. Anal Bioanal Chem 385, 392–400 (2006). https://doi.org/10.1007/s00216-006-0405-6

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  • DOI: https://doi.org/10.1007/s00216-006-0405-6

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