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【目的】研究红枣中VC和微量元素含量的测定方法,为南疆优质红枣种植提供科学依据。【方法】利用分光光度法和原子吸收分光光度法测定库尔勒、阿克苏、喀什地区红枣中的VC、铁、镁、锰、钙含量并对测定条件进行研究。【结果】测定库尔勒、阿克苏、喀什地区红枣中的VC的含量。结果表明,各地红枣中VC含量在1.872 6~2.566 2 mg/g。用分光光度法测定VC的含量,得到回归方程为A=0.047 1C~0.183 6,相关系数为R=0.990 56,红枣中VC含量:库尔勒红枣1.78 mg/g,阿克苏红枣1.53 mg/g,喀什红枣1.96 mg/g,利用原子吸收分光光度法测定库尔勒、阿克苏、喀什地区红枣中4种微量元素的含量分别是铁70.6~93.3、钙236.9~300,锰2.63~2.97和镁615~671μg/g。【结论】由结果看,红枣中VC含量不一致,大小为:喀什红枣>库尔勒红枣>阿克苏红枣。4种微量元素的含量也不一样,喀什地区红枣中铁的含量最高,阿克苏地区红枣中钙的含量最高,库尔勒地区红枣中锰和镁的含量最高。实验利用的测定方法简单,快速,成本低,适合大枣中VC和微元素的测定。
【Objective】 To study the determination method of VC and trace element content in jujube and provide scientific basis for planting high-quality dates in southern Xinjiang. 【Method】 The contents of VC, Fe, Mg, Mn and Ca in jujube in Korla, Aksu and Kashgar regions were determined by spectrophotometry and atomic absorption spectrophotometry. The determination conditions were studied. 【Result】 The content of VC in jujube in Korla, Aksu and Kashi areas was determined. The results showed that the VC content of jujube in each region was 1.872 6 ~ 2.566 2 mg / g. The content of VC was determined by spectrophotometry, the regression equation was A = 0.047 1C ~ 0.183 6, the correlation coefficient was R = 0.990 56, the content of VC in jujube was 1.78 mg / g for Korla jujube, 1.53 mg / g for Aksu jujube, 1.96 mg / g. The contents of four trace elements in jujube in Korla, Aksu and Kashgar were determined by atomic absorption spectrometry. The content of trace elements in the jujube were Khalil, Aksu and Kashgar, respectively, ranging from 70.6 to 93.3 for iron, 236.9 to 300 for calcium, 2.63 to 2.97 for manganese and 615 to 671 μg / g for magnesium. 【Conclusion】 According to the results, the content of VC in jujube is inconsistent, the size is: Kashgar jujube> Korla jujube> Aksu jujube. The contents of four trace elements are also different. The content of iron is the highest in the red dates in Kashgar region, the highest in the red dates in Aksu region, and the highest in the red dates in Korla region. The experimental method is simple, rapid, low cost and suitable for the determination of VC and microelements in jujube.