【摘要】 根据2000年6月10(14日在浙江西沪港采集的海水样品,用AA-800石墨炉原子吸收分光光度技术和阳极溶出伏安法测定样品中重金属Pb的含量,获得Pb在海水中受特定的有机配体控制结果如下:(1)溶解态Pb的表观配位容量和条件稳定常数分别为50.0nmol/dm3和9.73,表层海水中Pb溶解态总量为1.92nmol/dm3。(2)不同胶体粒级(小于或等于0.2、0.4、1.0μm粒级)中Pb的含量分别为1.25、1.67、2.11nmol/dm3;其中于0.2～0.4μm粒级间的颗粒物含Pb的量为0.42nmol/dm3;于1.0～0.4μm粒级间的颗粒物含Pb的量为0.44nmol/dm3。更多还原

【Abstract】 Based on the seawater samples collected from the Xihu Harbour, Zhejiang on June 10～14, 2000, we use AA800-Graphite Furnace Atomic Absorption Spectrophotometer(AAS) and Anodic Stripping Voltammetry (ASV) to determine the content of heavy metal Lead in the samples and acquire that Lead in seawater is controlled by specific organic complexes. Experiments showed that 1) the apparent Lead complexation capacity (APbCC) 50.0 nmol/dm3 and total Lead 1.92 nmol/dm3 in Xihu Harbour is higher. 2) The contents of Lead on different granlarity colloid ( less than or equal to 0.2, 0.4 and 1.0 μm ) in Xi Hu Bay were espectively 1.25,1.67 and 2.11 nmol/dm3. Thereinto the concentrations of lead were 0.42 nmol/dm3 and 0.44 nmol/dm3 in the contained respectively in granlavity 0.2～0.4 and 1.0～0.4 μm.更多还原