A comparative study of the purification of betanin - Gonçalves, Letícia Christina Pires; Trassi, Marco Aurélio de Souza; Lopes, Nathana Barbosa; Dörr, Felipe Augusto; Santos, Monica Teixeira dos; Baader, Wilhelm Josef; Oliveira Junior, Vani Xavier; Bastos, Erick Leite (Food Chemistry, 2012)