Selective determination of niobium in natural waters at the low ng L−1 level by differential pulse cathodic stripping voltammetry in the presence of pyrogallol red
| Autor: | Montserrat Filella, Marc Biver |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
010401 analytical chemistry Inorganic chemistry Niobium Analytical chemistry chemistry.chemical_element 010501 environmental sciences Electrochemistry 01 natural sciences Pollution 0104 chemical sciences Cathodic protection chemistry.chemical_compound Mineral water Hydrofluoric acid chemistry Pyrogallol Cathodic stripping voltammetry ddc:550 Environmental Chemistry Sample preparation Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Science of the Total Environment, Vol. 615 (2018) pp. 1406-1410 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2017.09.040 |
| Popis: | A completely selective method for electrochemical determination of very low concentrations (ng L− 1) of niobium is presented. The method relies on the cathodic reduction of the pyrogallol red‑niobium complex at pH 3. Virtually no sample preparation (apart from cation exchange) is required. The method is both free from interferences (particularly from Ta) and affordable. Time consuming preconcentration and separation procedures as well as the use of hydrofluoric acid, fluorides or problematic solvents are avoided. The applicability of the method is illustrated through analysis of mineral waters containing niobium concentrations ranging from 1 to several hundred ng L− 1. |
| Databáze: | OpenAIRE |
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