海巴戟中7种矿物质元素的测定

Determination of Mineral Elements in Morinda citrifolia L.

利用空气-乙炔火焰原子吸收光谱法对海巴戟果肉、叶、果实冻干粉及发酵果汁中的钾、钙、钠、镁、铁、锌、锰等7种重要矿物质元素进行测定.结果表明：实验回收率为94％ ～ 107.2％;海巴戟中钾、钙、锌、铁、锰元素含量丰富;海巴戟果肉中钾元素含量高,为24 215.81 μg·g^-1,钠元素含量相对较低,仅为789.40 μg·g^-1,是一种典型的低钠高钾保健食品,具有良好的保健养生价值.除钾元素外,叶中其他元素含量均高于果肉中的,尤其是微量元素铁、锌、锰的含量.海巴戟产品冻干粉中的7种元素含量与诺丽果肉中的接近.海巴戟发酵果汁与同一品种海巴戟果肉中的矿物质元素含量成一定比例,7种矿物质元素均能够满足人体需求.

The fruit flesh, leaves, freeze-dried powder of fruit, and fermented fruit juice of Noni （Morinda citrifo- lia L. ） were determined in terms of mineral elements, K, Ca, Na, Mg, Fe, Zn and Mn, by using Air-acetylene flame atomic absorption spectrometry. These elements had a recovery rate ranging from 94% to 107.2%. Noni was found to contain high K, Ca, Zn, Fe and Mn. In the fruit flesh K content was the highest, upto 24 215.8μg ·g^-1 while the Na content was relatively lower, only 789.4 μg· g^-1. Noni is hence a typical low-sodium and high- potassium food with high healthcare value. The leaves contained higher elements except K than the fruit flesh, es- pecially Fe, Zn and Mn, and hence have a good value for development. The freeze-dried fruit powder contained similar elements to the fruit flesh. The fermented fruit juice contained elements proportionate to the fruit flesh of the same variety of Noni. and the content of the elements was found to meet the needs of human being.