Arsenic in marine organisms: new species and new analytical approaches
Date
2012
Authors
Maher, W.A.
Foster, S.
Krikowa, F.
Duncan, E.
Raber, G.
Francesconi, K.A.
Editors
Ng, J.C.
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Understanding the geological and medical interface of arsenic: As 2012, 2012 / Ng, J.C. (ed./s), pp.363-366
Statement of Responsibility
Conference Name
4th International Congress on Arsenic in the Environment - Understanding the Geological and Medical Interface (As) (22 Jul 2012 - 27 Jul 2012 : Cairns, Australia)
Abstract
Recently two new classes of arsenic species have been identified in marine organisms; thio-arsenic species where the oxygen bonded to arsenic is replaced by a sulphur group and two types of arsenic-lipids, arsenic hydrocarbons and arsenic phospholipids. Here we describe the common species found in marine and HPLC-ICPMS analytical approaches to measure these species. Thio-arsenic species can be separated using C18 reverse phase chromatography with elution with aqueous phosphate buffer. Arsenic-lipids can be separated by C8 reverse phase chromatography with gradient elution comprising acetic acid and methanol with gradient elution conditions: 0-25 min, 50%-95% methanol; 25-40 min, 95% methanol. Using gradients, the introduction of methanol directly into the ICPMS spray chamber is required to compensate for the variable amounts of carbon in the mobile phase entering the ICPMS.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
Copyright 2012 Taylor and Francis Group