Distribution and Relationship of Flouride and Mineral Elements in Antarctic Krill
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Abstract:
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.
