Study of acid-base indicator property of flowers of Ipomoea biloba

Authors

  • Sajin Kattuvilakam Abbas Rajiv Gandhi Institute of Pharmacy, Trikaripur, Kasargod (dt), Kerala

DOI:

https://doi.org/10.3329/icpj.v1i12.12452

Keywords:

Ipomoea, pH indicators, natural pigments, flower pigments, neutralization indicators, phenolphthalein substitutes

Abstract

Indicators help to determine the equivalence point in acid base titrations (neutralization titrations). They show sharp color change with respect to change in pH. Commonly used indicators for neutralization titrations are synthetic in nature. They are found to posses hazardous effects in human body. The highly colored pigments obtained from plants are found to exhibit color changes with variation of pH. A study has been done to investigate the indicator activity of aqueous extract of flower pigments and compared with that of already existing synthetic indicators. Pigments were extracted using hot water and a definite volume was added which gave accurate and reliable results for all the four different types of neutralization titrations - strong acid against strong base, strong acid against a weak base, weak acid against strong base and weak acid against weak base. The work proved to be acceptable in introducing flower pigments as a substitute to the synthetic acid-base indicators.

DOI: http://dx.doi.org/10.3329/icpj.v1i12.12452

International Current Pharmaceutical Journal 2012, 1(12): 420-422

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Published

2012-11-01

How to Cite

Abbas, S. K. (2012). Study of acid-base indicator property of flowers of Ipomoea biloba. International Current Pharmaceutical Journal, 1(12), 420–422. https://doi.org/10.3329/icpj.v1i12.12452

Issue

Vol. 1 No. 12 (2012)

Section

Original Articles

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