Exploitation of Red Tea Flowers Extract ( Kujarat Tea ) as Acid – Base Indicator. | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 17, Issue 1, March 2012, Pages 130-136 | ||
| Author | ||
| Ismail K.Alhitti | ||
| Abstract | ||
| Aqueous and alcoholic extracts of Red tea flowers have been exploited as Acid-Base indicator.Three pigments were separated and identified including querecetin ,anthocyanin and gossyptein The potentiometric titration of the extracts have revealed sudden change in potential and pH at equivalence point. This titration have offered total acid percentage of more than 28% indicating the presence of Organic acids: Malic, Tartaric, Oxalic, Ascorbic and Citric acids in addition to the above three pigments which were identified by UV,Visible and IR spectroscopy. Therefore, Red tea extract has been confirmed in this reserch being used successfully as acid - base indicator .Its colour is changed at equivalence point from red ,violet or pink into green at which its action is matching methyl red and phenol red indicators. There were no effects of temperature and aging on the stability of the extract as indicator when identified by UV,V is ible and IR spectroscopy after six months. | ||
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