Rauret G, López-Sánchez J F, Sahuquillo A, Rubio R, Davidson C, Ure A, Quevauviller P
Departamento de Química Analítica, Universidad de Barcelona, 647 Avenida Diagonal, E-08034 Barcelona, Spain.
J Environ Monit. 1999 Feb;1(1):57-61. doi: 10.1039/a807854h.
The Standards, Measurements and Testing Programme (formerly BCR) of the European Commission proposed a three-step sequential extraction procedure for sediment analysis, following extensive expert consultations and two interlaboratory studies. This scheme was recently used to certify the extractable trace element contents of a sediment reference material (CRM 601). Although this procedure offers a means to ensure the comparability of data in this field, some difficulties concerning the interlaboratory reproducibility still remain, and a new project is currently being conducted to determine the causes of poor reproducibility in the extraction scheme. The final objective of the project is the certification of new sediment and soil reference materials for their extractable contents of Cd, Cr, Cu, Ni, Pb and Zn. This paper presents the results of a small-scale interlaboratory study, which aimed to test a revised version of the extraction schemes by comparing the original and the modified protocols using the CRM 601 sample. This work offers an improvement to the BCR sequential extraction procedure through intercomparison exercises. This improved procedure will allow the obtaining of CRMs to validate analytical data in the analysis of soils and sediments, and it will also facilitate comparability of data in the European Union.
欧盟委员会的标准、测量与测试计划（前身为BCR）在经过广泛的专家咨询和两项实验室间研究后，提出了一种用于沉积物分析的三步连续萃取程序。该方案最近被用于认证一种沉积物标准物质（CRM 601）中可萃取微量元素的含量。尽管此程序为确保该领域数据的可比性提供了一种方法，但实验室间再现性方面仍存在一些困难，目前正在开展一个新项目以确定萃取方案中再现性差的原因。该项目的最终目标是认证新的沉积物和土壤标准物质中镉、铬、铜、镍、铅和锌的可萃取含量。本文介绍了一项小规模实验室间研究的结果，该研究旨在通过使用CRM 601样品比较原始方案和修改后的方案来测试萃取方案的修订版。这项工作通过比对试验对BCR连续萃取程序进行了改进。这种改进后的程序将有助于获取标准物质以验证土壤和沉积物分析中的分析数据，还将促进欧盟数据的可比性。
