Harnessing Natural Plant Extracts (Hibiscus, Turmeric, and Henna) for Volumetric Analysis Indicators

Abstract

This study explores the use of natural plant extracts—Hibiscus, Turmeric, and Henna—as eco-friendly alternatives to synthetic indicators in volumetric analysis, addressing the growing need for sustainable practices in analytical chemistry. Conventional synthetic indicators, though effective, pose environmental risks due to their non-biodegradability and potential toxicity. The research involves extracting and preparing indicators from these plants and applying them in acid-base titrations to evaluate their effectiveness. Hibiscus, rich in anthocyanins, shows a distinct color change from red to greenish-yellow, making it suitable for strong acid-strong base titrations. Turmeric, containing curcumin, changes from yellow to reddish-brown in alkaline conditions, proving effective for weak acid-strong base titrations. Henna, with its lawsone component, transitions from yellow-orange to red-brown, useful in sensitive pH detection. The study finds that these natural extracts closely match the performance of synthetic indicators like phenolphthalein and methyl orange, while offering the benefits of biodegradability and non-toxicity. The research contributes to advancing eco-friendly analytical methods and highlights the potential of indigenous plants in scientific applications. Implementing these natural indicators could reduce the environmental impact of laboratory processes, promote the use of renewable resources, and encourage further exploration of natural products in various scientific fields.