2018-04-042018-04-042012GUIMARÃES, Wesson; ALVES, Maria Isabel Ribeiro; ANTONIOSI FILHO, Nelson Roberto. Antocianinas em extratos vegetais: aplicação em titulação ácido-base e identificação via cromatografia líquida/espectrometria de massas. Química Nova, São Paulo, v. 35, n. 8, p. 1673-1679, 2012.0100-4042e- 1678-7064http://repositorio.bc.ufg.br/handle/ri/14348Anthocyanins extracted from picao, quaresmeira, petunia, flamboyant, purple ipe, lobeira, pata de vaca, jaboticaba, purple cabbage and jambul were evaluated as natural acid-base indicators. Anthocyanins in extracts were identified using HPLC/MS. Clear, rapid change in color at final-point titration was observed for extracts but only picao showed strong change in pH. Indirect determination of carbonate in limestone using a natural indicator was performed and results compared with phenolphthalein indicator and potentiometer titration. Optimal results were obtained with picao but other extracts showed good accuracy and precision.porAcesso AbertoPHAnthocyaninsHPLCAntocianinas em extratos vegetais: aplicação em titulação ácido-base e identificação via cromatografia líquida/espectrometria de massasAnthocyanins in natural extracts: application in acid-base titration and identification by liquid chromatography/mass spectrometryArtigo10.1590/S0100-40422012000800030