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Asian Journal of Pharmaceutical Analysis
Year : 2019, Volume : 9, Issue : 1
First page : ( 5) Last page : ( 7)
Print ISSN : 2231-5667. Online ISSN : 2231-5675.
Article DOI : 10.5958/2231-5675.2019.00002.4

Flame lily as Natural pH Indicator

Todkar Rohit R.*, Patil Pallavi B., Vambhurkar Ganesh B., Jagtap Asha M., Gavade Akshata S., Jagtap Nisha M., Ambekari Asma D., Thorat Ankita M.

Rajarambapu College of Pharmacy, Kasegaon, Dist- Sangli, Maharashtra, India-415404

*Corresponding Author E-mail: rohit.todkarpharma@gmail.com

Online published on 15 March, 2019.


The substance which causes change in colour with respect to change in pH of solution is termed as acid-base indicator. At different pH range every indicator shows different range of colors. There are numbers of chemical or synthetic indicators which are used in acid-base titration but these are slight costlier and not available easily every time hence natural indicator i.e. obtained from plant source are come forth, because plants easily available every where extraction process is less expensive. We use Flame lily flower extract and phenolphthalein as indicators in titration s of strong acid-strong base (HCl and NaOH), strong acid-weak base (HCl and NH3), and weak acid-strong base (CH3COOH and NaOH) and weak acid-weak base (CH3COOH and NH3). The result obtained from titration of natural indicator (i.e. Flame lily) are near to the result obtained from titration of standard indicator (i.e. phenolphthalein).in this research work we successfully prove that natural indicator can also used in titration.



Flame lily, natural indicator, phenolphthalein, acid-base titration, acid-base indicator.


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