Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers
The need to develop effective alternative for synthetic indicators is the demand of present-day chemistry. The acid-base indicator properties of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) flowers were examined. Colour pigments were extracted from th...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Biochemistry Research International |
| Online Access: | http://dx.doi.org/10.1155/2015/381721 |
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| author | Stanley I. R. Okoduwa Lovina O. Mbora Matthew E. Adu Ameh A. Adeyi |
| author_facet | Stanley I. R. Okoduwa Lovina O. Mbora Matthew E. Adu Ameh A. Adeyi |
| author_sort | Stanley I. R. Okoduwa |
| collection | DOAJ |
| description | The need to develop effective alternative for synthetic indicators is the demand of present-day chemistry. The acid-base indicator properties of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) flowers were examined. Colour pigments were extracted from the flowers via cold and solvent extraction using soxhlet extractor. The pH value of the extracts with wavelengths of absorption was determined using ultraviolet spectrophotometer. From the results obtained, all the extracts exhibited sharp contrast between their colours in acid and base. Their pH was found to be 5.5 for cold extract of Rose and 5.6 for solvent extraction, 5.24 for cold extract of a Hibiscus and 6.52 for solvent extraction, 5.35 for cold extract of Allamanda, and 5.45 for solvent extraction. The maximum wavelengths of absorption obtained for all the extract fall within the visible region of electromagnetic spectrum. These values are almost similar to that obtained from synthetic indicators. It is on these bases that we concluded that natural indicators could be an excellent replacement for synthetic indicators since they are cheap, readily available, simple to extract, not toxic, user and environmentally friendly. |
| format | Article |
| id | doaj-art-4f1e1e6b4f294309a728211e49fd3f41 |
| institution | OA Journals |
| issn | 2090-2247 2090-2255 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Biochemistry Research International |
| spelling | doaj-art-4f1e1e6b4f294309a728211e49fd3f412025-08-20T02:05:38ZengWileyBiochemistry Research International2090-22472090-22552015-01-01201510.1155/2015/381721381721Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) FlowersStanley I. R. Okoduwa0Lovina O. Mbora1Matthew E. Adu2Ameh A. Adeyi3Directorate of Research and Development, Nigerian Institute of Leather and Science Technology (NILEST), Zaria 810001, Kaduna State, NigeriaDirectorate of Science Laboratory Technology, NILEST, Zaria 810001, Kaduna State, NigeriaDepartment of Medical Laboratory Services, Antiretroviral Therapy Centre, Central Hospital, Agbor 321251, Delta State, NigeriaDirectorate of Research and Development, Nigerian Institute of Leather and Science Technology (NILEST), Zaria 810001, Kaduna State, NigeriaThe need to develop effective alternative for synthetic indicators is the demand of present-day chemistry. The acid-base indicator properties of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) flowers were examined. Colour pigments were extracted from the flowers via cold and solvent extraction using soxhlet extractor. The pH value of the extracts with wavelengths of absorption was determined using ultraviolet spectrophotometer. From the results obtained, all the extracts exhibited sharp contrast between their colours in acid and base. Their pH was found to be 5.5 for cold extract of Rose and 5.6 for solvent extraction, 5.24 for cold extract of a Hibiscus and 6.52 for solvent extraction, 5.35 for cold extract of Allamanda, and 5.45 for solvent extraction. The maximum wavelengths of absorption obtained for all the extract fall within the visible region of electromagnetic spectrum. These values are almost similar to that obtained from synthetic indicators. It is on these bases that we concluded that natural indicators could be an excellent replacement for synthetic indicators since they are cheap, readily available, simple to extract, not toxic, user and environmentally friendly.http://dx.doi.org/10.1155/2015/381721 |
| spellingShingle | Stanley I. R. Okoduwa Lovina O. Mbora Matthew E. Adu Ameh A. Adeyi Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers Biochemistry Research International |
| title | Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers |
| title_full | Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers |
| title_fullStr | Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers |
| title_full_unstemmed | Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers |
| title_short | Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers |
| title_sort | comparative analysis of the properties of acid base indicator of rose rosa setigera allamanda allamanda cathartica and hibiscus hibiscus rosa sinensis flowers |
| url | http://dx.doi.org/10.1155/2015/381721 |
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