دورية أكاديمية
Determinação espectrofotométrica simultânea de cobre e ferro em álcool etílico combustível com reagentes derivados da ferroína Simultaneous spectrophotometric determination of iron and copper using ferroin reagents
| العنوان: | Determinação espectrofotométrica simultânea de cobre e ferro em álcool etílico combustível com reagentes derivados da ferroína Simultaneous spectrophotometric determination of iron and copper using ferroin reagents |
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| المؤلفون: | Leonardo S. G. Teixeira, João F. Brasileiro, Mário M. Borges Jr., Paulo W. L. Cordeiro, Sarah A. N. Rocha, Antonio C. Spínola Costa |
| المصدر: | Química Nova, Vol 29, Iss 4, Pp 741-745 (2006) |
| بيانات النشر: | Sociedade Brasileira de Química, 2006. |
| سنة النشر: | 2006 |
| المجموعة: | LCC:Chemistry |
| مصطلحات موضوعية: | alcohol fuel, ferroin, spectrophotometry, Chemistry, QD1-999 |
| الوصف: | In the present work three ferroin reagents were studied for the simultaneous spectrophotometric determination of iron and copper: 1,10-phenanthroline, 2,2'-bipyridine and 2,4,6-tri(2-pyridyl)-1,3,5-triazine. Effect of pH, conditions, order reagent addition, interferences, amount of reagents, lineal range, sensitivity and stability of each system were compared. The 2,4,6-tri(2-pyridyl)-1,3,5-triazine can be used for determination of iron in the presence of copper with a detection limit of 5 µg L-1 and coefficient of variation of 2.0%; However it was not possible to determine directly copper in the presence of iron with this reagent. 1,10-phenanthroline can be used for simultaneous determination of the metallic ions with detection limits of 7 and 8 mg L-1 and coefficients of variation of 1.8 and 2.3% in the determination of iron and copper, respectively. The results showed also that 2,2'-bipyridine can be used for simultaneous determination of the metallic ions with detection limits of 11 and 32 µg L-1 and coefficients of variation of 1.9 and 2.5% in the determination of iron and copper, respectively. The reagents were used for spectrophotometric determination of iron and copper in ethanol fuel. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Spanish; Castilian Portuguese |
| تدمد: | 0100-4042 1678-7064 |
| Relation: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000400020; https://doaj.org/toc/0100-4042; https://doaj.org/toc/1678-7064 |
| DOI: | 10.1590/S0100-40422006000400020 |
| URL الوصول: | https://doaj.org/article/463b3fcfff2b4147898c479a2fbcf15a |
| رقم الأكسشن: | edsdoj.463b3fcfff2b4147898c479a2fbcf15a |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 01004042 16787064 |
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| DOI: | 10.1590/S0100-40422006000400020 |