Abstract

EXTRACTION AND UTILIZATION OF HIBISCUS FLOWERS PIGMENTS AS AN INDICATOR IN TITRIMETRIC ANALYSIS

Firoj A. Tamboli*, Nagesh D. Nilawar, Vaishnavi Y. Jorgewar, Harinath N. More, Namdeo R. Jadhav, Suresh G. Killedar

ABSTRACT

Hibiscus petals commonly known as China rose. These petals were dried, pulverized into fine powder and extracted exhaustively with ethanol and water by the simple maceration method. After that we concentrate it and made some dilution and used as an indicator. The good results were obtained when it was tested against standard synthetic indicators. Titration shows sharp color change at the equivalence point. The equivalence points obtained by the flower extract coincide with the equivalence points obtained by standard indicators. Thus natural indicator is found to be a really useful, economical, simple and accurate for the said titrations. Using of natural product like colored plants or flowers as a medium for learning chemistry can realize of green chemistry principles by applying one or several of its principles. The finding indicates an alternate way of enriching laboratory practical with an instructional material that's useful, economical, simple and accurate for the said acid-base titration. Therefore, it's recommended for integrated science and chemistry instructions.

Keywords: Hibiscus petals commonly known as China rose. These petals were dried, pulverized into fine powder and extracted exhaustively with ethanol and water by the simple maceration method. After that we concentrate it and made some dilution and used as an indica