Abstract

EXTRACT AND EVALUATION OF GLEBIONIS CORONARIA: A NATURAL INDICATOR FOR ACID-BASE TITRATION

Suchitra Sharma*, Vikas Saxena and Nita Yadav

Abstract

The genus Glebionis, which belongs to the Asteraceae family, has about 600 species, and they are found all over the world. The current study focuses on the extraction and assessment of an acid-base indicator from a Glebionis coronaria species that is environmentally beneficial and native to the area. In the current investigation, acid-base titrations of four distinct types—strong acid against a strong base, strong acid against a weak base, weak acid against a strong base, and weak acid against a weak base—were conducted. Two bases (NaOH and NH4OH) and two acids (HCl and CH3COOH) were chosen for the acid-base titration. These bases and acids were utilized at a concentration of 0.1N. Natural indicators are promising when compared to commercially available synthetic acid-base indicators like methyl orange and phenolphthalein because they exhibit a sharp and dramatic colour change near the neutralizing point. It has also been found that using Glebionis coronaria flower extract as an indicator in various acid-base titrations is beneficial because of its low cost, environmental friendliness, availability, simplicity in preparation, lack of carcinogenicity, accuracy, and accuracy of results.

Keywords: Glebionis coronaria, Ethanolic flower extract, Acid Base titration, Natural Indicator, Natural pigments.