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• W2022158859 abstract "This study attempted the feasibility to use near infrared (NIR) spectroscopy as a rapid analysis method to qualitative and quantitative assessment of the tea quality. NIR spectroscopy with soft independent modeling of class analogy (SIMCA) method was proposed to identify rapidly tea varieties in this paper. In the experiment, four tea varieties from Longjing, Biluochun, Qihong and Tieguanyin were studied. The better results were achieved following as: the identification rate equals to 90% only for Longjing in training set; 80% only for Biluochun in test set; while, the remaining equal to 100%. A partial least squares (PLS) algorithm is used to predict the content of caffeine and total polyphenols in tea. The models are calibrated by cross-validation and the best number of PLS factors was achieved according to the lowest root mean square error of cross-validation (RMSECV). The correlation coefficients and the root mean square error of prediction (RMSEP) in the test set were used as the evaluation parameters for the models as follows: R=0.9688, RMSEP=0.0836% for the caffeine; R=0.9299, RMSEP=1.1138% for total polyphenols. The overall results demonstrate that NIR spectroscopy with multivariate calibration could be successfully applied as a rapid method not only to identify the tea varieties but also to determine simultaneously some chemical compositions contents in tea." @default.
• W2022158859 created "2016-06-24" @default.
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• W2022158859 date "2006-07-01" @default.
• W2022158859 modified "2023-10-04" @default.
• W2022158859 title "Feasibility study on qualitative and quantitative analysis in tea by near infrared spectroscopy with multivariate calibration" @default.
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• W2022158859 doi "https://doi.org/10.1016/j.aca.2006.05.007" @default.
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