Characterization of tannin based colorimetric indicator and its application on fish packaging
| Autor: | N M Erfiza, N R Purba, K Ahda, I Sulaiman, S Rohaya, F Razi |
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| Rok vydání: | 2021 |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 922:012057 |
| ISSN: | 1755-1315 1755-1307 |
| Popis: | This study aims to determine characteristics of the gel-type colorimetric indicator at various pH and under different storage conditions, then determine the indicator characteristic in the packaging of fish fillets during storage. The gel-type color indicator was synthesized with a concentration of 1%, 3%, and 5% gambir powder. The FT-IR spectra of the color indicator showed the presence of tannin functional groups, namely C=C aromatic rings, C-C phenolic, and C-H groups, respectively at wavenumbers 1517-1519, 1440-1475, and 752-761 1/cm. Moreover, the coefficient value of the Red-Green-Blue (RGB) of the indicator was changed over pH and did not appear to be consistent. Based on the Analysis of Variance (ANOVA) test, the concentration of gambir powder and duration of color indicator storage, respectively, had a significant effect (P |
| Databáze: | OpenAIRE |
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