%0 Journal Article
%T Validaci¨®n de 2 m¨¦todos espectrofotom¨¦tricos para la cuantificaci¨®n de taninos y flavonoides (quercetina) en Psidium guajaba, L.
%A Guti¨¦rrez Gait¨¦n
%A Yamilet Irene
%A Miranda Mart¨ªnez
%A Migdalia
%A Varona Torres
%A Noel
%A Rodr¨ªguez
%A Aida Tania
%J Revista Cubana de Farmacia
%D 2000
%I ECIMED
%X we validated two spectrometric methods that facilitate to quantify tannins and flavonoids in a raw drug from psidium guajaba l. since literature does not provide official methods for quantifying such compounds from this plant. it was determined that both methods (tungsten-molybdic-phosphoric method for tannins by miranda m., and spectrophotometric method for total flavonoids expressed as quercentin by kostennikova z as modified by m¨¦ndez g.) meet all the proposed validating requirement for a quality chemical control of the species (linearity, precision (repeatability and reproducibility) accuracy and specificity).
%K spectophotometry [methods]
%K tannins [analysis]
%K quercetin [analysis]
%K plant leaves.
%U http://scielo.sld.cu/scielo.php?script=sci_abstract&pid=S0034-75152000000100007&lng=en&nrm=iso&tlng=en