The 3 steps sequential extraction procedure proposed by the Standards Measurements and Testing program (SM&T - formerly BCR) of the European Union has been applied for the speciation of metals in sediments. Results obtained by the application of the BCR standardized procedure were compared to those of two four step sequential extraction procedures, which are different from the BCR procedure only for the introduction of an additional step with NaOCl, as 2ndand 3rdstep respectively. Five different metals have been taken into consideration: Cd, Cu, Ni, Pb and Zn. The analytical performances of the laboratory have been evaluated using three certified reference materials: the BCR 601 lake sediment for the BCR sequential extraction procedure, PACS-1 and MESS-1 for total metal concentration. Results showed that the efficiency of NaOCl treatment is higher or at least equal to that of H2O2treatment and that its selectivity is quite satisfying. Moreover the NaOCl treatment doesn't significantly influence the extraction of the easily reducible fraction.
|Pages (from-to)||409 - 419|
|Number of pages||11|
|Journal||Annali di Chimica|
|Publication status||Published - May 2004|
All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Environmental Science(all)
Craba, L., Brunori, C., Galletti, M., Cremisini, C., & Morabito, R. (2004). Comparison of three sequential extraction procedures (original and modified 3 steps BCR procedure) applied to sediments of different origin. Annali di Chimica, 94(5-6), 409 - 419.