Method for measuring anthocyanin content in wine grape pericarp based on hyperspectrum

Abstract

The invention discloses a method for measuring anthocyanin content in wine grape pericarp based on hyperspectrum. The method comprises the following steps: randomly picking off 1500 grapes from four plants in different yields and different levels, using 60 samples in total and taking each 25 grapes as a sample, randomly dividing the samples into a correction set and a check set, wherein the correction set comprises 40 samples and the check set comprises 20 samples; obtaining spectrum data of wine grape pericarp by using near-infrared hyperspectral image; measuring the anthocyanin content by using pH differential method; and establishing a prediction mode of the anthocyanin content in grape pericarp by combining the spectrum pre-treatment method and chemometrics modeling method. By adopting the spectral imaging technology, the imaging technology is combined with the spectrum detection technology, the target space feature is imaged, and the detection speed is fast, the efficiency is high and the cost is low; the method disclosed by the invention is suitable for the noninvasive detection about the quality and safety of the agricultural products, and the anthocyanin content in the wine grape pericarp is effectively detected.

Description

technical field [0001] The invention belongs to the field of wine brewing, and in particular relates to a hyperspectral-based method for measuring anthocyanin content in wine grape peels. Background technique [0002] Anthocyanins are an important class of phenolic compounds in grapes and wines, and they mainly exist in the vacuoles of the 3-4 layers of cells under the epidermis of grape berries. It is the main substance that gives wine its color, and has an important impact on its flavor, taste and nutritional value. It is one of the important factors determining the sensory quality of wine and the basis of red wine's storage resistance. Generally speaking, anthocyanins begin to accumulate rapidly after grape berry veraison, and reach the maximum when the fruit is ripe. Therefore, the content of anthocyanins at the time of grape picking greatly affects the color and other sensory qualities of the wine. [0003] At present, the determination of anthocyanin content in grape...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a hyperspectral-based method for the determination of anthocyanin content in wine grape peel, aiming to solve the problem that the existing chemical detection method will destroy the detection object, and it is difficult to achieve rapid and large sample size detection. There are still few studies on the rapid detection of anthocyanin content in wine grape fruit

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