羊栖菜不同部位微量元素含量测定及健康风险评价

运用电感耦合等离子体质谱 (inductively coupled plasma mass spectrometer， ICP MS)分析3个不同养殖区域成熟期羊栖菜（Sargassum fusiforme）主茎、侧茎、生殖托、气囊等部位中As、Cd、Cr、 Cu、Ni、Pb和Zn的含量，以揭示羊栖菜中这些微量元素在不同部位的分布特征。结果表明，羊栖菜具有较强的微量元素富集能力，不同部位的微量元素富集能力存在差异，主要富集在生殖托和气囊中。结果表明，各站位间As、Cd、Cr和Cu在各部位的分布特征较为相似，而Ni、Pb和Zn在各部位中的分布特征存在差异。羊栖菜对As的富集系数最高，对Cr的富集系数最小。根据健康风险评价结果，除了两个站位的生殖托外，摄入羊栖菜不会对人体产生健康风险，但是相对而言，茎干的食用风险更低。

Concentration and health risk assessment of trace elements in different tissues of Sargassum fusiforme

Inductively coupled plasma mass spectrometer (ICP-MS) was used to analyze the concentrations of As, Cd, Cr, Cu, Ni, Pb and Zn in the main blade, lateral blade, receptacles and pneumathode of Sargassum fusiforme at maturity, to reveal the distributions of trace elements in different tissues of Sargassum fusiforme. Our results showed that Sargassum fusiforme had a strong ability to enrich trace elements, which varied in different tissues. The trace elements usually accumulated more in receptacles and pneumathode. The distribution patterns of As, Cd, Cr and Cu in different tissues were similar, while that of Ni, Pb and Zn differed and varied with site investigated. The enrichment coefficient of As in alga was the highest, while that of Cr was the lowest. According to the results of risk assessment, there is no health risk to human body when taking Sargassum fusiforme as food except receptacles from two sites. Comparatively, the health risk of consuming branches is much lower.