Abstract
An extraction method is proposed in order to evaluate mercury species in biological samples (e.g. fish, mushrooms). Sulphur-containing ligands have been considered and thiourea was chosen for the optimised extraction procedure according to the best recovery obtained (65.9%, 75.8%, 47.1% and 98.2% for CH3Hg+, C2H5Hg+, CAH5Hg+and Hg2+respectively) and the chromatographic performance. Thiourea solutions added to biological samples enabled extraction of organomercury species; the influence of reaction time and recovery yields were evaluated. The proposed procedure, coupled with an on-line preconcentration step, allows to reduce contamination problems and to obtain detection limits at ng/g levels. The method has been evaluate with reference materials (BCR).
Original language | English |
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Pages (from-to) | 1-13 |
Number of pages | 13 |
Journal | International Journal of Environmental Analytical Chemistry |
Volume | 60 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 May 1995 |
Externally published | Yes |
Keywords
- HPLC-CV-AAS
- Mercury speciation
- extraction procedure
- organomercury