Proceedings of the 1st International Conference on Islam, Science and Technology, ICONISTECH 2019, 11-12 July 2019, Bandung, Indonesia.

Research Article

Use of Butterfly Pea (Clitoria ternatea) Extract as an Indicator in Acid Base Titration

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  • @INPROCEEDINGS{10.4108/eai.11-7-2019.2298058,
        author={Vina  Amalia and Yulia  Sukmawardani and Siti Fajri Nurramdani and Asep  Supriadin},
        title={Use of Butterfly Pea (Clitoria ternatea) Extract as an Indicator in Acid Base Titration},
        proceedings={Proceedings of the 1st International Conference on Islam, Science and Technology, ICONISTECH 2019, 11-12 July 2019, Bandung, Indonesia.},
        publisher={EAI},
        proceedings_a={ICONISTECH},
        year={2021},
        month={1},
        keywords={acid base titration butterfly pea flowers  extracts indicators},
        doi={10.4108/eai.11-7-2019.2298058}
    }
    
  • Vina Amalia
    Yulia Sukmawardani
    Siti Fajri Nurramdani
    Asep Supriadin
    Year: 2021
    Use of Butterfly Pea (Clitoria ternatea) Extract as an Indicator in Acid Base Titration
    ICONISTECH
    EAI
    DOI: 10.4108/eai.11-7-2019.2298058
Vina Amalia1,*, Yulia Sukmawardani2, Siti Fajri Nurramdani1, Asep Supriadin1
  • 1: Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Bandung, Indonesia
  • 2: Department of Chemistry Education, Faculty of Tarbiya and Teacher Training, UIN Sunan Gunung Djati Bandung, Bandung, Indonesia
*Contact email: vinaamalia@uinsgd.ac.id

Abstract

Butterfly pea flowers are native plants from Southeast Asia that have two colors, purple and blue. This striking color is known to contain anthocyanin and chlorophyll. Anthocyanin compounds give different color responses to different pH conditions, so with these properties butterfly pea flower extract can potentially be a bioindicator of acid-base titration. The anthocyanin content of butterfly pea flower extract depends on the solvent used in the extraction process. In this experiment, dried butterfly pea flowers were extracted with 70% ethanol and 25% acetic acid with a ratio of 7: 1. The experimental results showed that the type of anthocyanin contained in dried butterfly pea flower extract in ethanol and acetic acid solvents was cyanidin. The pH range of the dried butterfly pea flower indicator for acidimetry at pH 3-5 by showing purple color, while for alkalimetry at pH 8-9 with yellowish green color. A pH below 3 indicates red while pH above 9 will show yellow and PH 6-7 shows a turquoise color. Indicator solutions still provide good results after a four-week storage period. This shows that the application of butterfly pea flower extract bioindicator is quite good in alkalimetry titration.