Determination of Al, Cu, Fe, Mn, Pb and Zn in certified reference materials using the optimized BCR sequential extraction procedure

被引:138
|
作者
Sutherland, RA
Tack, FMG
机构
[1] Univ Hawaii, Dept Geog, Geomorphol Lab, Honolulu, HI 96822 USA
[2] State Univ Ghent, Lab Analyt Chem & Appl Ecochem, B-9000 Ghent, Belgium
关键词
fractionation; CRM; 483; 601; SRM; 2710; 2711; CW; 7; acid extractable; reducible; oxidizable; standardized sequential extraction;
D O I
10.1016/S0003-2670(01)01553-7
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Sequential extraction procedures are widely used to characterize the fractionation of metal species in solid media. With the variety of different sequential procedures used in environmental and geochemical exploration studies, it is difficult to compare results between studies. Thus, harmonization and standardization are required to provide greater inter-study comparability for fraction-specific metals. In this study, the optimized BCR three-step sequential extraction procedure is applied to five certified reference materials (SRM 2710, SRM 2711, CRM 483, CRM 601 and CW 7). Four fractions are reported, acid extractable, reducible, oxidizable, and residual for Al, Cu, Fe, Mn, Pb and Zn. The objectives of this study were to characterize experimental precision and/or accuracy and to establish baseline data of fraction-specific element concentrations for future studies applying the optimized BCR three-step extraction procedure. The optimized procedure was found to be precise (typically <5%) for all metals in all fractions. Accuracy was acceptable (typically +/-15% relative to published indicative values for Cu, Ph and Zn for CRM 483 and CRM 601) for all individual fractions. Detailed fraction-specific concentration data are presented, based on five replicates, for the first time using the optimized procedure for At, Fe and Mn in CRM 483 and CRM 601, and for Al, Cu, Fe, Mn, Ph and Zn in SRM 2710, SRM 2711 and CW 7. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:249 / 257
页数:9
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