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All Journal Jurnal Rekayasa Material, Manufaktur & Energi
Hasyimiyyah, Amany
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Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Pengaruh Konsentrasi Natrium Benzoat dan Lama Penyimpanan terhadap Waktu Respon Lakmus Organik Ekstrak Bunga Telang Hasyimiyyah, Amany; Kusumantoro, Heribertus Rudi; Pratama, Yoga Putra
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.24759

Abstract

The butterfly pea flower contains anthocyanins that function as natural pH indicators but are prone to fungal growth. This study aimed to investigate the effect of sodium benzoate concentration and storage duration on the response time of bio litmus paper made from butterfly pea (Clitoria ternatea) flower extract. Sodium benzoate was added as an antifungal agent at concentrations of 0%, 1%, 2%, and 3%. Samples were stored for 0, 7, and 14 days, then tested for response time and fungal contamination. Results showed that only samples without sodium benzoate exhibited fungal growth after 14 days. Storage for 7–14 days improved response time efficiency. ANOVA analysis indicated that sodium benzoate concentration, storage duration, and their interaction significantly affected response time. This study demonstrates that sodium benzoate addition and proper storage can enhance the effectiveness and stability of butterfly pea-based bio litmus paper as a natural pH indicator.
Co-Authors Kusumantoro, Heribertus Rudi Pratama, Yoga Putra