Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
6795805
Reference Type
Journal Article
Title
Chromium available fractions in arousa sediments using a modified microwave BCR protocol based on microwave assisted extraction
Author(s)
Pazos-Capeans, P; Barciela-Alonso, MC; Bermejo-Barrera, A; Bermejo-Barrera, P; ,
Year
2005
Is Peer Reviewed?
1
Journal
Talanta
ISSN:
0039-9140
EISSN:
1873-3573
Publisher
ELSEVIER SCIENCE BV
Location
AMSTERDAM
Page Numbers
678-685
Language
English
PMID
18969852
DOI
10.1016/j.talanta.2004.07.031
Web of Science Id
WOS:000226276500010
URL
https://linkinghub.elsevier.com/retrieve/pii/S0039914004004539
Exit
Abstract
In a research of chromium availability, the three-stage sequential extraction procedure, proposed by European Community Bureau of Reference (BCR), has been applied for the metal fractionation in marine sediment samples. The procedure has been modified, evaluating the effect of microwave energy to perform the sequential method. Results achieved a substantial reduction in time in comparison to the traditional shaking technique. The time of the first and the second extractions were reduced to 30 s in both steps using microwave heating and working at 66 W of power. To the third extraction, higher power was necessary so it was chosen to work at 198 W. In the last step investigated, time was reduced to 1 min, being a great improvement respect to the conventional BCR sequential extraction protocol.Chromium determinations in these extracts were carried out by Electrothermal Atomic Absorption Spectrometry (ETAAS). The developed method was applied for chromium determination in marine sediment samples from Ria de Arousa (Galicia, NW of Spain). The values obtained by our laboratory ranged from 0.10 to 1.02 mug g(-1) for soluble and reducible fractions, and from 5.5 to 60.0 mug g(-1) for the oxidisable fraction. The higher concentrations obtained were the chromium associated with the organic fraction of the marine sediments. (C) 2004 Elsevier B.V. All rights reserved.
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity