التفاصيل البيبلوغرافية
| العنوان: |
Avaliação das variáveis analíticas do método de Folin-Ciocalteu para determinação do teor de taninos totais utilizando como modelo o extrato aquoso de folhas de psidium guajava L. |
| المؤلفون: |
Verza, Simone Gasparin, Kreinecker, Maria T., Reis, Valquíria, Henriques, Amélia T., Ortega, George González |
| المصدر: |
Química Nova. August 2007 30(4) |
| بيانات النشر: |
Sociedade Brasileira de Química, 2007. |
| سنة النشر: |
2007 |
| مصطلحات موضوعية: |
tannins, casein, hide powder |
| الوصف: |
The main analytical variables of a modified Folin-Ciocalteu method were studied by UV-Vis and gradient HPLC-PDA methods, using purified (PC) and technical grade (TGC) casein. Rutin and an aqueous extract of Psidium guajava L. leaves were used as models. The best results were ascribed to TGC. Certainly PC bonds the polyphenols of the P. guajava extract better than TGC, but TGC afforded better precision. A lack of specificity occurred when rutin was analyzed together with the P guajava extract. Additional analyses performed with the flavonoid fraction of P. guajava extract by HPLC-PDA had confirmed that casein was able to bind catechin, gallic acid and P. guajava flavonoids in a non-specific way. |
| نوع الوثيقة: |
article |
| وصف الملف: |
text/html |
| اللغة: |
Portuguese |
| تدمد: |
0100-4042 |
| DOI: |
10.1590/S0100-40422007000400011 |
| URL الوصول: |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000400011 |
| Rights: |
info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edssci.S0100.40422007000400011 |
| قاعدة البيانات: |
SciELO |
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