CN101059426A - Method for non-destructive measurement for tea polyphenol content of tea based on near infrared spectrum technology - Google Patents
Method for non-destructive measurement for tea polyphenol content of tea based on near infrared spectrum technology Download PDFInfo
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Abstract
本发明公开了一种基于近红外光谱技术无损测量茶叶中茶多酚含量的方法,首先要建立校正模型,收集茶叶样本作为校正样本集,并扫描得到校正样本集的可见光和近红外光谱(325-2500nm),对得到的光谱数据进行光谱预处理。然后采用国标规定的方法测量校正样本的茶多酚含量。采用多元校正回归算法建立校正样本的近红外光谱与茶多酚含量之间的定量关系,即建立了校正模型。对于待检测的茶叶,只要扫描它们的近红外光谱图,并把经过相应光谱预处理的光谱数据输入到校正模型,经过校正模型的测定即得到了该茶叶的茶多酚含量。整个过程在计算机的控制下,实现数据的采集、存储、显示和处理功能。
The invention discloses a method for non-destructively measuring the content of tea polyphenols in tea leaves based on near-infrared spectroscopy. First, a calibration model is established, and tea samples are collected as a calibration sample set, and the visible light and near-infrared spectra of the calibration sample set are obtained by scanning (325 -2500nm), spectral preprocessing is performed on the obtained spectral data. Then use the method specified in the national standard to measure the content of tea polyphenols in the calibration sample. The quantitative relationship between the near-infrared spectrum of the calibration sample and the content of tea polyphenols was established by using the multivariate calibration regression algorithm, that is, the calibration model was established. For the teas to be detected, just scan their near-infrared spectra, and input the spectral data after corresponding spectral preprocessing into the calibration model, and the tea polyphenol content of the tea can be obtained after the calibration model is measured. The whole process is under the control of the computer to realize the functions of data collection, storage, display and processing.
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2007
- 2007-05-29 CN CN 200710069114 patent/CN101059426A/en active Pending
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CN114778484A (en) * | 2022-05-10 | 2022-07-22 | 广东省农业科学院茶叶研究所 | Tea quality grade classification method and device, equipment and storage medium |
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