Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 411258
Title HPLC inorganic arsenic speciation analysis of samples containing high sulfuric acid and iron levels
Author(s) Gonzalez-Contreras, P.A.; Gerrits, I.P.A.M.; Weijma, J.; Buisman, C.J.N.
Source Toxicological & Environmental Chemistry 93 (2011)3. - ISSN 0277-2248 - p. 415 - 423.
Department(s) Sub-department of Environmental Technology
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) icp-oes - spectrometry
Abstract To monitor the oxidation of arsenite to arsenate in oxidizing and bioleaching reactors, speciation analysis of the inorganic arsenic compounds is required. Existing arsenic speciation analysis techniques are based on the use of liquid chromatography columns coupled to detector equipment such as inductively coupled plasma optical emission spectrometry (ICP-OES). These techniques are fairly complex and expensive. Therefore, for analysis of arsenic speciation in our studies on thermophilic iron and arsenic oxidation, we developed a simple (and inexpensive) method based on anionic ion exclusion chromatography using sulfuric acid as mobile phase, followed by UV detection. The detection limit was 0.1¿mg¿L-1 of arsenite (As3+) and 0.1¿mg¿L-1 of arsenate (As5+). The method was validated with samples from an iron-oxidizing bioreactor containing 0.12¿mol¿L-1 H2SO4, 1¿g¿L-1 arsenic, and 3¿g¿L-1 iron. Samples from arsenopyritic gold concentrates by partial bio-oxidation and leaching samples were analyzed, showing the usefulness of the method for arsenic contained in environmental compartments. We also describe the apparent effect of the arsenic valence state on ICP-OES detection for total arsenic.
There are no comments yet. You can post the first one!
Post a comment
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.