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Dao, L.T., Takeoka, G.R., Edwards, R.H. and Berrios, J.D.J. (1998) Improved Methods for the Stabilization of Antho-Cyanidins. Journal of Agricultural and Food Chemistry, 46, 3564-3569.
http://dx.doi.org/10.1021/jf980359v

has been cited by the following article:

• TITLE: Urena lobata Flowers: A Green Route to Volumetric Analysis

  AUTHORS: Dixa Singh, Vimal Sheel Singh

  KEYWORDS: Urena lobata Flowers, Phenolphthalein, Methyl Orange, Acid-Base Titration, Anthocyanin

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.5 No.1, January 22, 2015

  ABSTRACT: The aqueous and alcoholic extract of Urena lobata flowers has been used in acid/alkali titrations over a wide range of concentration. The results obtained with the flower extracts have been compared with those obtained by using traditional chemical indicators like phenolphthalein and methyl orange. It has been established experimentally that the flower extract can be successfully used in place of phenolphthalein and methyl orange for acid/alkali titrations. The presence of anthocyanins is supposed to impart pH sensitive colour dependence to the natural indicator.