Open AccessEfficiency and Effectiveness of Universal Indicator from Native Plants in South of Thailand
Author(s) -
Tatcha Sampim,
Salinkarn Phupa,
Supitcha Sampim
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1340/1/012018
Subject(s) - native plant , distilled water , horticulture , environmental science , mathematics , botany , microbiology and biotechnology , biology , chemistry , chromatography , introduced species
A chemical universal indicator is generally the device of acid base indicator. But there are some limitations like environmental pollution, availability, and higher cost which lead to search for natural compounds as an acid base indicator was started. To solve these limitations based on STEM theory, the universal indicator from native plants in South of Thailand such as Melastoma, Phae, Mulberry, Sweet potato, Kuuam, Blue pea, Pandanus palm, Turmeric, and Roselle was developed to a useful pH indicator device. The objectives of this research are to compare the native plants colour extraction of the solution between distilled water and 95 % of ethanol solution, to identify the stable and clear colour drying paper, and to analyse efficiency and effectiveness of the universal indicator from native plants. The results showed that all of native plant can be extracted by ethanol solution 95 percent. There are six stable and clear colour paper including Melastoma, Phae, Mulberry, Blue pea, Turmeric, and Roselle that can be made to the universal indicator from native plants. The resolution efficiency can be divided the pH measurement into 7 ranges: 1-2, 3-4, 5-6, 7, 8-11, 12, 13-14. The 30 randomly effectiveness tests of the universal indicator from native plants has 100 percent of accuracy.