不同产地海蒿子、羊栖菜中无机元素的含量分析与评价

 通过分析不同产地海蒿子、羊栖菜中无机元素含量及分布特征，以期为海藻药材有害元素限量标准制定、海藻资源的综合开发利用提供理论依据。海藻样品经灰化或消解处理后，采用微波消解-电感耦合等离子体-原子发射光谱法、碘离子选择性电极法分析了不同产地海藻药材的30 种无机元素，并运用主成分分析法对海藻药材进行了综合评价。结果表明，不同产地海藻含有19~26 种无机元素，无机元素平均含量按由高到低的顺序依次为K>Ca>Na>Mg。25 批海藻样品中，有害元素Cu 平均含量为7.83 mg/kg，Hg 为1.54 mg/kg，Pb 为3.07 mg/kg，Cd 为3.02 mg/kg，As 为109.35 mg/kg，Al 为1434.26 mg/kg。海蒿子、羊栖菜中大部分元素无显著性差异。主成分综合评分法显示，山东烟台海蒿子样品H₄、H₃和浙江温州羊栖菜样品Y₅、Y₆综合排序较高，表明在仅考虑无机元素含量的情况下，这4 种海藻样品品质较好。

Analysis and Evaluation of Inorganic Elements in Sargassum pallidum and Sargassum fusiforme from Different Regions

The analysis and evaluation of inorganic elements in Sargassum pallidum and Sargassum fusiforme from different regions provide may theoretical evidences for formulating harmful elements limit standards and comprehensive utilization of sargassum. The contents of 30 inorganic elements in Sargassum from different regions were determined by ICP- AES and iodine ion- selective electrode after ashing and digestion. Principal component analysis was carried out to evaluate Sargassum samples. The results showed that Sargassum from different regions contain 19~26 inorganic elements, with the average contents K>Ca>Na>Mg. The mean values of Cu, Hg, Pb, Cd, As and Al are 7.83, 1.54, 3.07, 3.02, 109.35, and 1434.26 mg/kg, respectively. No significant difference between S. pallidum and S. fusiforme was found in most elements. Principal component comprehensive scoring showed Samples H₄ and H₃ of S. pallidum from Yantai and Samples Y₅ and Y₆ of S. fusiforme from Wenzhou are the top four, indicating that these regions have better S. pallidum and S. fusiforme in terms of inorganic elements.