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《Ocean Technology》 2004-02
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Comparative Study on Two Aqua Regia Digestion Methods forMeasuring the Heavy Metal Contents in Offshore Sediments

QIAO Yong-min1, LIN Chao-ping2, HUANG Chang-jiang3 (1. Institute of Hydrobiology Jinan University, Guangzhou, Guangdong, 510632; 2.Analytical center of Jinan university, Guangzhou, Guangdong, 510632;3. Institute of Aquatic Technology and Environmental Resources protection,Shantou University, Shantou, Guangdong 515063)  
Three surface sediment samples, collected from Zhelin Bay, Guangdong province, were digested by aqua regia for 24h at the temperature of 115℃ (method A), and treated by H 2O 2 and then digested by aqua regia at the temperature of 150℃. The digested solution was vaporized for two times (method B). The concentration of Fe、Mn, Cu, Zn, Pb, Cr, Ni, Co and Cd were measured by the method of ICP-AES The statistical result showed that total contents of Cr, Pb, Zn and Fe measured were significantly higher while using method A than that while using method B, and the contents of Cd, Co, Mn, Ni were of no significant differences while using both methods. The method A was a reliable routine method for digesting offshore sediments, which uses little reagent, and has low blank value, and high extracting rate for all kinds of heavy metals in offshore sediments.
【Fund】: 广东省重大科技兴海资助项目 ( A2 0 0 0 0 5 F2 0 );; 广东省自然科学基金 ( 0 2 12 60 )
【CateGory Index】: X834
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