微波消解-ICP-AES测定鄱阳湖流域沉积物中微量元素

为了研究鄱阳湖沉积物中微量元素近几年来随季节、年度及沿程的变化情况,对2003年和2005年不同季节采集的鄱阳湖流域各采样点底泥进行了ICP-AES测定.结果表明,鄱阳湖沉积物中各元素的含量随着季节和年度变化而发生一定改变,枯水期普遍大于丰水期;南矶山2005年Cu和Pb含量较2003年有所降低;蔡家湾则与南矶山相反;姚公渡2005年Cu含量也较2003年低,Pb含量则高于2003年;与鄱阳湖流域底泥背景值相比,所测几个样点的Cu,Pb,Cr和Zn含量均在一定程度上超标;除大坞河外,其余各样点As含量均在背景值范围内;从饶河到鄱阳湖入湖口处,各元素含量呈逐渐降低趋势.文章提出的研究方法操作简便,效率高,劳动强度低.

Determination of Trace Elements in the Sediments of Poyang Lake Basin by Microwave-Assisted-ICP-AES

In order to investigate the seasonal,annual and alongshore variation of the trace elements in the sediments of Poyang Lake in recent years,ICP-AES was used to determine the sediment of each sampling site collected in the year of 2003 and 2005 in different seasons.The results indicated that the contents of the elements in the sediments of Poyang Lake were changing with seasons and years.Generally,the content of each element in low-water period was more higher than in high-water period.Compared with the year of 2003,the contents of Cu and Pb at Nan Ji-shan were lower in the year of 2005,while Cai Jia-wan was in the reverse situation.The content of Cu at Yao Gong-du was also lower in the year of 2005,but Pb was higher than in the year of 2003.To some extent,the contents of Cu,Pb,Cr and Zn were higher than the background value of Poyang Lake basin.Except Dawu River,the content of As at other sampling sites was within the background value.From Raohe River to the Raohe River's entry in Poyang Lake,the content of each element trended to decrease gradually.By using microwave-assisted-ICP-AES to determine the trace elements in the sediments of Poyang Lake,it was proved to be a simple and fast,efficient method.