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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cidu, Rosa Biddau, Riccardo Dore, Elisabetta |
| Description | Author Affiliation: Cidu R ( Cagliari University, Dipartimento di Scienze Chimiche e Geologiche, via Trentino 51, 09127 Cagliari, Italy. Electronic address: cidur@unica.it.); Biddau R ( Cagliari University, Dipartimento di Scienze Chimiche e Geologiche, via Trentino 51, 09127 Cagliari, Italy.); Dore E ( Cagliari University, Dipartimento di Scienze Chimiche e Geologiche, via Trentino 51, 09127 Cagliari, Italy.) |
| Abstract | Chemical speciation [Sb(V) and Sb(III)] affects the mobility, bioavailability and toxicity of antimony. In oxygenated environments Sb(V) dominates whereas thermodynamically unstable Sb(III) may occur. In this study, a simple method for the determination of Sb(III) in non acidic, oxygenated water contaminated with antimony is proposed. The determination of Sb(III) was performed by anodic stripping voltammetry (ASV, 1-20 µg L(-1) working range), the total antimony, Sb(tot), was determined either by inductively coupled plasma mass spectrometry (ICP-MS, 1-100µgL(-1) working range) or inductively coupled plasma optical emission spectrometry (ICP-OES, 100-10,000 µg L(-1) working range) depending on concentration. Water samples were filtered on site through 0.45 µm pore size filters. The aliquot for determination of Sb(tot) was acidified with 1% (v/v) HNO3. Different preservatives, namely HCl, L(+) ascorbic acid or L(+) tartaric acid plus HNO3, were used to assess the stability of Sb(III) in synthetic solutions. The method was tested on groundwater and surface water draining the abandoned mine of Su Suergiu (Sardinia, Italy), an area heavily contaminated with Sb. The waters interacting with Sb-rich mining residues were non acidic, oxygenated, and showed extreme concentrations of Sb(tot) (up to 13,000 µg L(-1)), with Sb(III) <10% of total antimony. The stabilization with L(+) tartaric acid plus HNO3 appears useful for the determination of Sb(III) in oxygenated, Sb-rich waters. Due to the instability of Sb(III), analyses should be carried out within 7 days upon the water collection. The main advantage of the proposed method is that it does not require time-consuming preparation steps prior to analysis of Sb(III). |
| File Format | HTM / HTML |
| ISSN | 00032670 |
| Journal | Analytica Chimica Acta |
| Volume Number | 854 |
| e-ISSN | 18734324 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-01-07 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Environmental Chemistry Analytical Chemistry Biochemistry |
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