Development of paper indicator from sambang colok (Aerva sanguinolenta) plant extract

3rd Annual Applied Science and Engineering Conference

工业技术;自然科学

Sopiah, S.^1 ; Sari, S.^1 ; Windayani, N.^1

Prodi Pendidikan Kimia, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. A.H. Nasution No. 105, Bandung

40614, Indonesia^1

关键词: Absorbance measurements;    Absorbances;    Color changes;    Ethanol extract;    Experimental methods;    Filter papers;    Phenolic compounds;    UV-vis spectrophotometry;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/434/1/012082/pdf
DOI  :  10.1088/1757-899X/434/1/012082

来源: IOP

【 摘 要 】

This study aims to develop a paper indicator from Aerva sanguinolenta plant extract. The experimental method is used including the analysis of the dye, the extraction of various solvents, the test of the phenolic compound, and the absorbance measurement of the UV-Vis spectrophotometry of the plant extract, and the creation of indicator paper by absorbing the extract of A. sanguinolenta, and testing it on the pH range of 1-14. The experimental results show that the indicator made from coarse filter paper with ethanol extract of the polypropylene binder of the decoction product has the best characteristic shown by the absorbance of 1,186 ppm of bright purple anthocyanin. The resulting color change range is evident from purple to yellow in the pH range 11-12. This research is expected to facilitate the teacher using indicator paper in practice.