Creation of Basic Solution Detector Using Curcumin as Indicator

• Main Author: - Nim: 13713061 , HANSEN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27714
• Institution: Institut Teknologi Bandung

<p align="justify">One factor that contaminate good water is the pH of the water. Therefore the waste that will be thrown, its pH has to be check foremost. Curcumin, a dyeing agent in turmeric could detect the alkalinity of the waste. Curcumin will be extracted from an 8 months old turmeric with ethanol 96% as the extractor. The extraction will be done multiple times with different weight percent of the turmeric against the amount of ethanol to get the most optimum composition to get the curcumin extract. The extraction is done by stirring the mixture along with heating it using reflux equipment and then filtered amd dried. The dried extract will be taken to be tested using FTIR and UV-Vis spectroscopy and also given a response test using NaOH solution and detergent solution with the range of pH between 8-12. Based on the result from UV-Vis Spectroscopy, the maximum wavelength absorbed by the extract is shown around 422-423 nm, which can be concluded is the same with the reference. FTIR result also indicating that the extracted sample is curcumin and also by the response test, the extract can detect base.<p align="justify">