Composition Analysis and Nutritional Evaluation of Zizyphus jujuba Mill. cv. Xiaokou
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Abstract:
In this study, the main composition, including the active and aroma-contributing components of Zizyphus jujuba Mill. cv. Xiaokou, a product of the National Geographical Logo brand, was evaluated. The results showed that the total sugar content was 64.69%; the potassium content (13170 mg/kg) was the highest among all mineral elements. In addition, the jujube is a rich source of active components, including various vitamins and flavonoids, among which the concentrations of water-soluble flavonoids, alcohol-soluble flavonoids, cyclic adenosine monophosphate (cAMP), and total triterpenes were 8.1, 452.8, 13.88, and 425 mg/100g, respectively. The composition of total amino acids (TAA) was 4.95%, and the ratio of essential amino acids (EAA)/TAA and EAA/nonessential amino acids (NEAA) was 33.89% and 51.28%, respectively. All EAAs were found in a balanced proportion, and the first limiting amino acid was lysine. Additionally, 22 aroma-contributing compounds were identified, including three alcohols, two aldehydes, two ketones, eight acids, and seven esters. Compared with You jujube, Mu jujube, and Tuan jujube, Zizyphus jujube Mill. cv. Xiaokou contained ethyl butyrate, methyl decanoate, and ethyl caproate at concentrations of 0.86%, 1.04%, and 0.46%, respectively. The results indicate that Zizyphus jujube Mill. cv. Xiaokou has high nutritional value.
