Publication: A flow system for the determination of metal speciation in soil by sequential extraction
Issued Date
2001-01-01
Resource Type
ISSN
18736750
01604120
01604120
Other identifier(s)
2-s2.0-0035000076
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Environment International. Vol.26, No.5-6 (2001), 381-387
Suggested Citation
J. Shiowatana, N. Tantidanai, S. Nookabkaew, D. Nacapricha A flow system for the determination of metal speciation in soil by sequential extraction. Environment International. Vol.26, No.5-6 (2001), 381-387. doi:10.1016/S0160-4120(01)00016-2 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/26543
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Title
A flow system for the determination of metal speciation in soil by sequential extraction
Author(s)
Abstract
A flow extraction system with on-line and off-line flame atomic absorption spectrometric (FAAS) detection was developed to speed up, facilitate, and improve the accuracy of sequential extraction for metal speciation in solid materials. A flow extraction system with off-line detection was more advantageous than the on-line detection. In the proposed system, extraction was performed in a closed extraction chamber where extractants were flowing through sequentially. The extract from each extraction was collected in 4-10 fractions to obtain a total of approximately 180 ml for subsequent FAAS determination. The system is simple, easy to construct and operate. It has less risk of contamination and human error. A widely used three-step sequential extraction scheme was used to evaluate the novel system by analyzing Ca, Fe, Mn, Cu, and Zn in a certified reference material. The extraction time for three-step sequential extraction of soil sample was 4 h. The analytical results for Ca, Fe, Mn, Cu, and Zn of a soil certified reference material using the proposed system were compared with those of the conventional batch extraction. © 2001 Elsevier Science Ltd. All rights reserved.