Method for distinguishing huaniu apple from red delicious apple

Abstract

The invention discloses a method for distinguishing a huaniu apple from a red delicious apple. The method includes detecting the hydrogen isotope ratio [delta]2H and the oxygen isotope ratio [delta]180 of water in fruit juice based on multiple huaniu apple and red delicious apple samples of known origins; constructing a huaniu apple training sample set and a red delicious apple training sample set; comparing the measured values of the hydrogen isotope ratio [delta]2H and the oxygen isotope ratio [delta]180 of water in fruit juice of the samples to be distinguished with the training sample sets and determining the species. According to the characteristics that the hydrogen and oxygen isotopic composition of the water content of a fruit are related only to the hydrogen and oxygen isotopic composition of a water source during the growth process and the climate and environment of a place of origin, the method can quickly and effectively distinguish the huaniu apple and the red delicious apple, is helpful to the authenticity identification of samples of unknown origins. The method, when used, only needs to compare the measured values of the hydrogen isotope ratio [delta]2H and the oxygen isotope ratio [delta]180 of the sample to be distinguished with the training sample sets, and is easy to operate, feasible, and reliable in test results.

Description

technical field [0001] The invention relates to the technical field of food authenticity detection and inspection, in particular to a method for identifying Huaniu apples and American red snakes. Background technique [0002] Huaniu apple is a special product in Tianshui City, Gansu Province, my country. It belongs to the marshal apple. The fruit shape is conical, the peel is bright red, and the flesh is yellow-white. Produced in the western region of the United States, it belongs to the marshal apple. Its fruit shape, peel and flesh color are very similar to Huaniu apples. Among them, the red snake fruit in Washington State, the United States is the most famous, and it occupies most of the imported red snake fruit market in my country. . [0003] Due to factors such as standardized production, quality classification and brand premium of imported fruits, the price of imported fruits is often higher than that of domestic fruits. For example, the price of American snake fruit i...

AI Technical Summary

Problems solved by technology

However, the appearance of Huaniu apple and red snake fruit is very similar, and the rate of misjudgment by naked eye is high; and the quality of the fruit is related to the water and fertilizer management of the orchard and the climatic conditions of planting. There are large differences between years, and the quality identification is difficult to guarantee. High accuracy rate; although near-infrared spectroscopy has the characteristics of non-destructive and rapid detection, modeling is difficult, especially for fruit samples, and its ability to distinguish is easily interfered by factors such as spectral information collection position and fruit maturity

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