• Dr. R. F. Pagariya

Indicators used in neutralization titration show well marked changes of colour in certain intervals of pH. Most of these indicators are organic dyes and are of synthetic origin. Today synthetic indicators are the choice of acid-base titrations. But due to environmental pollution, availability and cost, the search for natural compounds as an acid-base indicator was started. The present vocation highlights the exploit of Murraya Koenigii fully ripened fruit extract as a pH indicator in strong acid-strong base and weak acid-weak base titrations. This natural indicator is easy to prepare as well as easily available. The results showed that the fruit extract of Murraya Koenigii indicator is colourless in acidic solution, while greenish yellow in basic solution. The comparison indicators used in this research were methyl red, methyl orange and phenolphthalein. Promising results were obtained when it was compared against standard synthetic indicators. Volumetric titrations between acid and base shows sharp colour change at the equivalence point. The equivalence points obtained coincide with the equivalence points obtained by standard indicators. Therefore this natural indicator is found to be a very useful, economical, simple, accurate and eco-friendly for acid base titration.

FruitExtract, Murraya Koenigii, Natural indicator, Acid base indicator, Equivalence point. Address for Correspondence:

"MURRAYA KOENIGII FRUIT EXTRACT AS HERBAL SUBSTITUTE FOR HAZARDOUS INTERNAL INDICATORS IN VOLUMETRIC ANALYSIS ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.290-292, April-2019, Available :http://www.jetir.org/papers/JETIRBD06055.pdf

"MURRAYA KOENIGII FRUIT EXTRACT AS HERBAL SUBSTITUTE FOR HAZARDOUS INTERNAL INDICATORS IN VOLUMETRIC ANALYSIS ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp290-292, April-2019, Available at : http://www.jetir.org/papers/JETIRBD06055.pdf