Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicator
Clitoria ternatea flowers are a readily extractable source of anthocyanin. This study aimed to understand the effect of pH (5, 7, and 8) on the thermal stability of anthocyanin-impregnated Whatman paper (AIP) at elevated temperatures (80, 90, and 98 °C). Color degradation, expressed in terms of Chro...
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EDP Sciences
2025-01-01
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| Series: | BIO Web of Conferences |
| Online Access: | https://www.bio-conferences.org/articles/bioconf/pdf/2025/20/bioconf_isofst2025_01002.pdf |
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| author | Margareta Mika Hariyadi Purwiyatno Suyatma Nugraha Edhi Marpaung Abdullah Muzi |
| author_facet | Margareta Mika Hariyadi Purwiyatno Suyatma Nugraha Edhi Marpaung Abdullah Muzi |
| author_sort | Margareta Mika |
| collection | DOAJ |
| description | Clitoria ternatea flowers are a readily extractable source of anthocyanin. This study aimed to understand the effect of pH (5, 7, and 8) on the thermal stability of anthocyanin-impregnated Whatman paper (AIP) at elevated temperatures (80, 90, and 98 °C). Color degradation, expressed in terms of Chroma, was monitored using the CIE Lab color model (a*, b*, and C*). The results showed that the degradation rate increased with pH and temperature, with degradation rate constants at 80, 90, and 98°C for AIP5, AIP7, and AIP8 being 0.0004, 0.0010, 0.0018; 0.0015, 0.0041, 0.0059; and 0.0031, 0.0047, 0.0065 min-1, respectively. This indicates that pH 8 is the most unstable, so it causes the highest amount of color change. Activation energies were highest for AIP5 (89.35 kJ/mol), indicating that pH 5 is the most responsive to change in reaction rate with temperature fluctuations compared to AIP7 (82.26 kJ/mol) and AIP5 (43.70 kJ/mol). These findings suggest that AIP8’s rapid degradation at high temperatures makes it a potential candidate for high-temperature indication, while AIP5’s greater temperature sensitivity could be exploited for applications requiring the detection of smaller temperature variations. |
| format | Article |
| id | doaj-art-418e37a9fdec424ca19e24a0386caee3 |
| institution | DOAJ |
| issn | 2117-4458 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
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| series | BIO Web of Conferences |
| spelling | doaj-art-418e37a9fdec424ca19e24a0386caee32025-08-20T02:48:28ZengEDP SciencesBIO Web of Conferences2117-44582025-01-011690100210.1051/bioconf/202516901002bioconf_isofst2025_01002Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicatorMargareta Mika0Hariyadi Purwiyatno1Suyatma Nugraha Edhi2Marpaung Abdullah Muzi3Department of Food Science and Technology, Faculty of Agricultural Engineering and Technology IPBDepartment of Food Science and Technology, Faculty of Agricultural Engineering and Technology IPBDepartment of Food Science and Technology, Faculty of Agricultural Engineering and Technology IPBDepartment of Food Technology, Swiss German UniversityClitoria ternatea flowers are a readily extractable source of anthocyanin. This study aimed to understand the effect of pH (5, 7, and 8) on the thermal stability of anthocyanin-impregnated Whatman paper (AIP) at elevated temperatures (80, 90, and 98 °C). Color degradation, expressed in terms of Chroma, was monitored using the CIE Lab color model (a*, b*, and C*). The results showed that the degradation rate increased with pH and temperature, with degradation rate constants at 80, 90, and 98°C for AIP5, AIP7, and AIP8 being 0.0004, 0.0010, 0.0018; 0.0015, 0.0041, 0.0059; and 0.0031, 0.0047, 0.0065 min-1, respectively. This indicates that pH 8 is the most unstable, so it causes the highest amount of color change. Activation energies were highest for AIP5 (89.35 kJ/mol), indicating that pH 5 is the most responsive to change in reaction rate with temperature fluctuations compared to AIP7 (82.26 kJ/mol) and AIP5 (43.70 kJ/mol). These findings suggest that AIP8’s rapid degradation at high temperatures makes it a potential candidate for high-temperature indication, while AIP5’s greater temperature sensitivity could be exploited for applications requiring the detection of smaller temperature variations.https://www.bio-conferences.org/articles/bioconf/pdf/2025/20/bioconf_isofst2025_01002.pdf |
| spellingShingle | Margareta Mika Hariyadi Purwiyatno Suyatma Nugraha Edhi Marpaung Abdullah Muzi Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicator BIO Web of Conferences |
| title | Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicator |
| title_full | Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicator |
| title_fullStr | Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicator |
| title_full_unstemmed | Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicator |
| title_short | Effect of pH on the color thermal degradation of Clitoria ternatea anthocyanin-impregnated Whatman paper: A study on its potential as high-temperature colorimetric indicator |
| title_sort | effect of ph on the color thermal degradation of clitoria ternatea anthocyanin impregnated whatman paper a study on its potential as high temperature colorimetric indicator |
| url | https://www.bio-conferences.org/articles/bioconf/pdf/2025/20/bioconf_isofst2025_01002.pdf |
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