南极磷虾中氟与矿质元素的分布特征及其相关性分析

Distribution and Relationship of Flouride and Mineral Elements in Antarctic Krill

应用离子色谱和原子吸收仪测定了南极磷虾各组织中氟和11种矿质元素的含量,并对其进行相关性分析。结果显示,南极磷虾中氟含量为2095.17±8.63 mg/kg,组织分布为:外壳>尾足>头胸>肌肉;Mg、Ca、P的含量分别为6771.54±30.22 mg/kg,4398.75±25.72 mg/kg,4692.11±25.1 mg/kg,且组织分布相同;K和Na含量分别为7310.59±35.62 mg/kg和9098.50±53.41 mg/kg,但组织分布不同;6种微量元素含量依次为Cu>Zn>Se>Fe>Mn>Cr,其含量分别为43.59±2.31mg/kg、36.23±2.35mg/kg、3.89±0.21 mg/kg、3.51±0.13mg/kg、2.49±0.23 mg/kg和0.25±0.02 mg/kg。其中只有Cu和Mn的组织分布相同;此外,Se含量(3.89±0.21 mg/kg)比一般海虾中高出2～4倍。相关性分析表明,氟仅与Mg、Ca、P、Mn、Se呈现明显的正相关,相关系数(R2)分别是0.5675、0.7024、0.7088、0.5792和0.6091,说明南极磷虾中氟的赋存形态与这五种元素息息相关。另外,南极磷虾也是一种提供Se及矿质元素补充的良好食物来源。

The contents of flouride and 11 kinds of mineral elements in antarctic krill were determined by ion chromatography and atomic absorption spectrometer respectively. The results showed that the fluoride content in antarctic krill was 2095.17±8.63 mg/kg. In the tissues, the distribution of fluoride was as follow as： shell 〉 tail foot 〉 head chest 〉 muscle. The contents of Mg, Ca and P in Antarctic krill were 6771.54±30.22 mg/kg, 4398.75±25.72mg/kg and 4692.11±25.1 mg/kg, respectively, which was similar to that distributed in tissue. The contents of K and Na in Antarctic krill were 7310.59±35.62 mg/kg and 9098.50±53.41 mg/kg, respectively, which was different from that distributed in tissue. The contents of 6 kinds of trace elements in Antarctic krill were Cu （43.59±2.31 mg/kg） 〉 Zn （36.23±2.35 mg/kg） 〉 Se （3.89±0.21 mg/kg） 〉 Fe （3.89±0.21 mg/kg） 〉 Mn （2.49±0.23 mg/kg） 〉 Cr （0.25±0.02 mg/kg）. Among these reace elements, Cu and Mn showed similar tissue distributions to each other, and the content of Se in Antarctic krill was 2-4 times higher than that in common domestic shrimps The correlation analysis indicated that fluoride content had a positive correlation with Mg, Ca, P, Mn and Se contents with the correlation coefficients （R2） being of 0.5675, 0.7024, 0.7088, 0.5792 and 0.6091, respectively. No obvious relationship with other mineral elements was found. The antarctic krill also could be used as a good food source of selenium and mineral elements.