Extraction and Evaluation of Natural Indicator from Almond Exocarp

Pasupuleti Sunitha*, N.V. Bhavya Sri, C.V.S. Raghukiran
Teegala Krishna Reddy College of Pharmacy, Meerpet, Hyderabad, Telangana

A B S T R A C T
In neutralization titrations indicators are used to show sharp color change at intervals of pH. Natural pigments in plants are highly colored substances and may show color changes with changes in pH. The present study highlights the use of exocarp of Prunus amygdalus family Rosaceae as indicator in neutralization titrations. Titration shows sharp color change at the equivalence point which coincides with the synthetic indicator. The extract was analyzed to confirm the presence of Anthocyanins. Prominent absorption peak at 500-550nm in the visible region confirmed the presence of Anthocyanins.
Keywords: Neutralization titration, Natural indicators, Anthocyanins, Prunus amygdalus