Development of pH Measuring Strip Test Based On West Kalimantan Local Plant

• Main Authors: Aprianus Aril (Author), Masriani Masriani (Author), Husna Amalya Melati (Author)
• Format: Book
• Published: Universitas Sultan Ageng Tirtayasa, 2022-07-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 2502-4779; 2502-4787; 10.30870/educhemia.v7i2.15252
• Keywords: indicator strip; acid-base; biodegradable; local plant; Education; L; Education (General); L7-991; Chemistry; QD1-999
• Source: EduChemia, Vol 7, Iss 2, Pp 267-277 (2022)

<span data-preserver-spaces="true">Synthetic acid-base indicators possess some disadvantages. Therefore, it is necessary to develop a natural acid-base indicator made from a mixture of plant extracts, which has a strip form, is safe, eco-friendly, has a wide pH range, and has clear color changing. This research aims to determine the pH range, make a pH indicator in the strip form, and produce a biodegradable acid-base indicator made from a mixture of </span><em>Melastoma malabathricum</em><span data-preserver-spaces="true"> flower, </span><em>Dioscorea alata</em><span data-preserver-spaces="true"> rhizome, </span><em>Syzygium paniculatum</em><span data-preserver-spaces="true"> leaves, </span><em>Garcinia</em><span data-preserver-spaces="true"> fruit peel, </span><em>Eleutherine bulbosa</em><span data-preserver-spaces="true"> rhizome extracts. Plant extracts were obtained using the maceration method. pH range was evaluated using the visual method by sensing the color changing in the pH range from 1 to 14. pH indicator strip was made by applying filter paper in the strip form into the extract mixture for 2 hours. The biodegradable property of acid-base indicator strips was established by measuring indicator strip degradation after planting it in the ground for 20 days at room temperature. The results showed that the acid-base indicator strip made from a mixture of plant extracts was able to give a color change from pink to light green in the pH range of 3-8 and can be decomposed completely after planting it in the ground for 20 days. Thus, it indicated that a natural pH indicator strip based on West Kalimantan plants has the potential to be developed as a safe and effective acid-base indicator to substitute synthetic acid-base indicators. </span>