Pérez-Cid B, Lavilla I, Bendicho C
Universidad de Vigo, Area de Química Analítica, Edificio Politécnica, Orense, Spain.
Analyst. 1996 Oct;121(10):1479-84. doi: 10.1039/an9962101479.
Two sequential extraction schemes were employed for speciation of Cu, Cr, Pb, Ni and Zn in sewage sludges: the conventional Tessier scheme and the sequential extraction scheme proposed by the European Communities Bureau of Reference (BCR). Both sequential extraction schemes were compared in terms of operation time, matrix effects and extraction efficiency. Two sludge samples collected from an urban wastewater processing plant at different seasons were analysed by FAAS for total contents and for extractable metals present in each fraction. Partitioning patterns were obtained for each metal so that metal mobility could be predicted. Both sequential extraction schemes yielded similar performance when extraction efficiencies were compared but matrix effects caused by concomitants were less pronounced in the BCR scheme in comparison with the Tessier scheme.
采用两种连续萃取方案对污水污泥中的铜、铬、铅、镍和锌进行形态分析：传统的 Tessier 方案和欧洲共同体参考局（BCR）提出的连续萃取方案。从操作时间、基体效应和萃取效率方面对这两种连续萃取方案进行了比较。用火焰原子吸收光谱法（FAAS）分析了从城市污水处理厂在不同季节采集的两个污泥样品中的总含量以及各组分中可萃取金属的含量。获得了每种金属的分配模式，以便预测金属的迁移率。比较萃取效率时，两种连续萃取方案的性能相似，但与 Tessier 方案相比，BCR 方案中伴随物引起的基体效应不太明显。
