【摘要】 海水中溶解态稀土元素由于其含量极低且水体干扰较多,少有研究.采取流动注射分离富集加上电感耦合等离子体质谱技术,测定了2016年7月长江口邻近海域水体中稀土元素含量,并研究了稀土元素的配分模式和分馏特征.结果表明,研究海域海水中稀土元素含量为0.20ng/kg(Lu)～39.45ng/kg (Y),重稀土元素相对轻稀土元素富集、轻稀土元素亏损的特征十分明显.所有站位的Ce均表现为负异常,表明该海域处于氧化环境;Ho/Y均值在0.024～0.027,高于海水均值,表明水体中Y相对于重稀土元素优先析出.更多还原

【Abstract】 There have been few researches on dissolved rare earth elements in seawater due to their extremely low levels in seawater.In this paper,using the flow injection in separation-enrichment and inductively coupled plasma mass spectrometry technology in determination,we measured the concentration of dissolved rare earth elements in seawater collected in the sea area adjacent to the Yangtze River Estuary in July,2016,and results showed the contents varied from 0.20 ng/kg(Lu)to 39.45 ng/kg(Y).The data analysis showed significant scavenge of LREEs;HREEs were more enriched than LREEs in this area.The Ce-anomaly at all stations was negative,indicating that this area was an oxidized environment.The Ho/Y mean value was 0.024 to 0.027,which was higher than the average of seawater.更多还原