Volume : 3, Issue : 2, February - 2014
Investigation of Herbal Acid Base Indicator
Prashant Thote
Abstract :
In acid- base titrations, indicators are used to show a sharp color changes at interval of pH. Natural pigments in plants are highly colored substances and may show color changes with variation of pH. Pulps of the fruit are pH sensitive and give different colors in acidic condition (pink) and basic condition (dark greenish). An attempt has been made to investigate the indicator activity of boil distilled water fruit extract of Citrullus lanatus and to replace the synthetic indicators as they have certain disadvantages like chemical pollution, availability problems and high cost. Distilled water fruit extract of m from family Citrullus lanatus gives sharp and intense color changes as compared to Phenolphthalein, Methyl Red and Phenol Red. Herbal indicators are evaluated by using strong acid-strong base, strong acid-weak base, weak acid-strong base and weak acid-weakbase. In all these titrations the extract was found to be very useful and accurate for indicating the neutralization point.
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Cite This Article:
Prashant Thote Investigation of Herbal Acid Base Indicator Global Journal For Research Analysis, Vol:III, Issue:II Feb 2014