ACID BASE INDICATOR PROPERTY OF LAWSONIA INERIMES LEAVES
Abstract
Indicators used in titration show well-marked changes of color in certain intervals of pH. Most of these indicators are organic dyes and are of synthetic origin. The environmental pollution caused by chemical industries in the synthesis of organic dyes had made the scientist in the developing country to enter in to an era, in which plant product serve as an alternative to synthetic products. Natural pigments in plants are highly colored substances and may show color changes with variation of pH. Lawsonia inermis (henna plant) has been used in herbal medicine for ages. However, the medical benefits of this plant have been discussed in only a few publications. the study helped to realize that the leaves pigment of hina could be effectively used as a substitute to the presently existing indicators owing to the factors like simple preparation, good performance and accurate and precise results. It was found that the extract changes the color at different pH and can be used successfully as indicator.
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