南极磷虾硒及矿质营养的初步研究

A PRELIMINARY STUDY OF SELENIUM AND MINERAL ELEMENTS IN ANTARCTIC KRILL

应用AFS和ICP-AES测定分析了南极磷虾和中国海虾样品中的硒和其他12种矿质元素的含量,并做了对比研究。结果显示,南极磷虾中含有丰富的人体必需元素,特别是Se、P、Mg、Zn,其中,Se含量范围为:2.48—4.15mg/kg[均值:(3.32±0.73)mg/kg],所采集样品硒含量为中国海虾硒含量的2—5倍。普通干燥的南极磷虾中其他矿质元素,如P的平均含量为(14.31±0.45)mg/g,Mg为(6.18±0.16)mg/g,Zn为(153.9±5.7)mg/kg,约为中国海虾中含量的1.5倍。此外,样品中砷含量为0.68—1.22mg/kg,低于国标GB4810-94对海产品中砷的限量要求≤2.0mg/kg(以无机砷计)。这些结果表明南极磷虾不仅可以作为提供硒及矿质元素的一个良好的食物来源,还可以用作饲料添加剂、食品添加剂的加工原材料。

The contents of selenium and mineral elements in Antarctic krill and domestic shrimp were determined by hydride generation - atomic fluorescence spectrometry （HG-AFS） and inductively coupled plasma atomic emission spectrometry （ICP-AES） , respectively. The results showed that Antarctic krill selenium content ranged from 2.48 to 4.15 mg/kg （ average value ： 3.32 ±0.73 ）, which was 2-5 times higher than that in domestic shrimps. Meanwhile, the Antarctic krill P, Mg, and Zn was 14.31±0.45 mg/g, 6.18 ±0.16 mg/g and 153.9 ±5.7 mg/kg, respectively, which was approximately 1.5 time higher than that in domestic shrimps. Additionally, the Antarctic krill arsenic content ranged from 0.68 to 1.22 mg/kg, which was significantly lower than the national arsenic content standard GB4810-94 for seafood （ ≤2.0 mg/kg, as inorganic arsenic）. The results revealed that Antarctic krill is not only a good food source of selenium and some other mineral elements, but also can be used as the raw materials of aquaculture feedstuff selenium additives and selenium-enriched food additives for the residents in selenium deficiency areas.