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- Title
Assessment of Transition Metals Toxicity in Environmental Matrices Using Potentiometric Electrodes: Inorganic Mercury(II) in the Seawater as a Case Study.
- Authors
Matos, Marina R. A.; Gomes, M. Teresa S. R.; Oliveira, Joao A. B. P.; Alves, Eliana; Cunha, M. Angela S. D. A.; Almeida, Adelaide; Rudnitskaya, Alisa
- Abstract
Chalcogenide glass electrode was applied to the detection of mercury(II) activity in the saline bromide buffers and artificial seawater at the activity levels corresponding to the acute toxicity. Mercury(II) toxicity in artificial seawater buffers and estuarine water was assessed using bioassay based on the luminescence of the marine bacterium A. fischeri. Electrode could detect mercury activity in the artificial seawater at the level of acute toxicity, which corresponded to pHg 23.2 (time of exposure 5 min.). Both electrode and bioassay indicated higher Hg2+ activity/toxicity in the estuarine water collected in the contaminated area. Quantification of Hg2+ activity in estuarine water using the mercury-selective electrode requires calibration procedure to account for matrix effects.
- Subjects
MERCURY content of seawater; MERCURY &; the environment; GLASS electrodes; CHALCOGENIDE glass; BUFFER solutions; LUMINOUS bacteria
- Publication
Electroanalysis, 2015, Vol 27, Issue 8, p1932
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201400713