| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13401600 Piracicaba - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | Analytical Sciences; v. 30, n. 8, p. 833-838, AUG 2014. |
| Web of Science Citations: | 3 |
| Abstract | |
In flow-based analytical procedures requiring heating, liberation of air bubbles is avoided by trapping a sample selected portion into a heated hermetic environment. The flow-through cuvette is maintained into a temperature-controlled aluminium block, thus acting as the trapping element and allowing real-time monitoring. The feasibility of the innovation was demonstrated in the spectrophotometric catalytic determination of vanadium in mineral waters. Air bubbles were not released even for temperatures as high as 95 degrees C. The proposed system handles about 25 samples per hour, requires only 3 mg p-anisidine per determination and yields precise results (r.s.d. = 2.1%), in agreement with ICP-MS. Detection limit was evaluated (3.3 a criterion) as 0.1 mu g L-1 V. (AU) | |
| FAPESP's process: | 11/08011-6 - Novel approaches for exploiting relatively slow chemical reactions in flow analysis. Applications to samples of environmental and agronomical relevance. |
| Grantee: | Ana Clara Felix Vida |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 11/23498-9 - Advanced flow systems for technological, agronomical and environmental analysis |
| Grantee: | Elias Ayres Guidetti Zagatto |
| Support Opportunities: | Research Projects - Thematic Grants |