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Method for non-destructive measurement for tea polyphenol content of tea based on near infrared spectrum technology

A technology of near-infrared spectroscopy and tea polyphenols, which is applied in the field of optical analysis of materials, can solve problems such as time-consuming, complicated measurement process, and the need for chemical reagents, and achieve the effects of reducing detection costs, speeding up analysis, and not polluting the environment

Inactive Publication Date: 2007-10-24
ZHEJIANG UNIV
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Problems solved by technology

These methods have a common feature that the measurement process is complex, time-consuming, requires chemical reagents, and samples need to be destructively pretreated
These are not conducive to the online detection and circulation of goods

Method used

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  • Method for non-destructive measurement for tea polyphenol content of tea based on near infrared spectrum technology

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Embodiment Construction

[0018] The acquisition device consists of a near-infrared spectrometer, a halogen lamp supporting the spectrometer, a computer, a standard calibration plate, a sample pool, and a power supply. The wavelength of the spectrometer is 325-2500nm. The spectrometer is connected to the PC computer with a data line, and the sample is placed in a special glass sample container. The angle between the spectrometer probe and the center of the sample container is 45 degrees. After the spectral data collection is completed, the data processing and analysis are carried out with the special spectral analysis software ASD ViewSpec ProV2.14 and Unscramble V9.2.

[0019] Whole implementation process of the present invention is as shown in accompanying drawing:

[0020] ① Establishment of calibration sample set spectra. First, collect tea samples of different varieties, different production processes, and different harvest periods (spring tea, summer tea, autumn tea) to establish a calibration...

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Abstract

The invention discloses a method for non-damage measuring the tea polyphenol content in tea, based on near-infrared spectrum technique, which comprises that first building a correct model, collecting tea sample as correct sample group, scanning the correct sample group to obtain visible light spectrum and near-infrared light spectrum (325-2500nm), processing spectrum pretreatment on the spectrum data, then using international standard method to measure the tea polyphenol content of correct sample, using multi-element correct regression algorism to build the quantitative relationship between the near-infrared spectrum and the tea polyphenol content of the correct sample, to build the correct model. The invention only needs to scan the near-infrared spectrum of object tea, and input pretreated spectrum data into the correct model which can test the tea polyphenol content. The whole process is controlled by a computer, to realize data pickup, store, display and process functions.

Description

technical field [0001] The invention relates to a method for analyzing materials by optical means, in particular to a method for non-destructively measuring the content of tea polyphenols in tea based on near-infrared spectroscopy. Background technique [0002] Tea polyphenols (tea polyphenols) is the general term for phenolic substances and their derivatives in tea, accounting for about 16% of the quality of tea, mainly including catechins, flavonoids, flavonols, anthocyanins, anthocyanins and Phenolic acids and phenolic acids. Because of its extensive and definite significant biological activities such as anti-oxidation, anti-tumor, anti-aging, anti-caries, anti-bacterial, anti-virus, blood pressure, blood lipid, and blood sugar, the content of tea polyphenols in tea has become the key to the quality of tea. Important indicators. Traditional tea polyphenols measurement methods include: high performance liquid chromatography, capillary electrophoresis, fluorescence detect...

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Application Information

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IPC IPC(8): G01N21/27G01N33/00G06F17/00
Inventor 何勇李晓丽裘正军陆江峰
Owner ZHEJIANG UNIV
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