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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidade Estadual Paulista Júlio de Mesquita Filho
2005
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| Online Access: | https://www.redalyc.org/articulo.oa?id=42930310 |
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Table of Contents:
- Fast determination of minoxidil by photometric flow titration R. A. de Sousa F. S. Semaan J. A. F. Baio E. T. G. Cavalheiro Química flow titration photometric titration minoxidil determination A photometric flow titration based on the redox reaction between KMnO4 and minoxidil isdescribed. The best titration results were observed at 3.20 x 10-4 mol L-1 KMnO4 and 1.00 x 10-3 mol L-1minoxidil, using the minoxidil solutions as titrant. The flow rate was fixed at 17 mL min-1 and the titrantwas added to the system in aliquots of 500 µL, the color changes were monitored at 550 nm. The methodwas applied to commercial samples and compared with the results from a chromatographic procedure.Recoveries from 97.6 to 102.8 % were observed depending on the sample. Comparison with thechromatographic procedure reveled relative errors of 3.5 - 4.0 %. 2005 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42930310 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.3 Vol.30