橙汁主要矿质元素含量的特征分析

矿质元素的含量与组成特征是评价橙汁品质与判断橙汁来源的重要指标。采用火焰原子吸收光谱法对我国重庆地区15个橙汁样品中钾，钙，钠，镁四种矿质元素的含量进行了测定，用箱线图和因子分析法对样品元素含量特征进行了分析。结果表明， 橙汁中钾元素含量最高(1 233.75～1 866.23 mg·L-1)，其次为镁(77.51～167.15 mg·L-1)和钙(49.32～125.29 mg·L-1)元素，而钠元素含量最低(1.22～9.26 mg·L-1)，该结果与欧盟果蔬汁工业协会(AIJN)提供的橙汁鉴伪与质量评价参考值范围基本一致;因子分析的结果表明，橙汁中钠元素含量的不同是区分冬橙与夏橙橙汁的主要因素。研究结果为我国橙汁品质评价、标准体系的建立及鉴伪研究提供了重要的基础数据。

The Characteristic Analysis of Several Mineral Contents in Chinese Orange Juice

A study was carried out on the contents of mineral elements such as K, Ca, Na, and Mg in seven different orange varieties, namely Pineapple orange, Hamlin, Trovita, Jincheng, 1 232 Tangor, Olinda Valencia and Delta Valencia, by flame atomic absorption spectrometry. The results indicated that the content sequence of different nutritional elements was K＞Mg＞Ca＞Na, with a range of 1 233.75-1 866.23, 77.51-167.15, 49.32-125.29 and 1.22-9.26 mg·L-1 respectively. The range scale of the four elements was largely consistent with the reference value of AIJN (Association of the Industry of Juices and Nectars from Fruits and Vegetables of the European Union). The samples can be clustered into 2 groups by factor analysis, and lower Na content would be the characteristic of the Valencia varieties. All these data would offer important information for orange juice adulteration determination and quality evaluation.