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Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli

The extracted roselle was characterized by brilliant red colour that rich in anthocyanin and can be used as a natural food colorants. There are many factors that influenced the stability of anthocyanin such as extraction time, temperature, pH and stability on light. The extraction of pigments were c...

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Main Author: Zulkifli, Nur Afiqah
Format: Student Project
Language:English
Published: 2017
Subjects:
Laboratories. General works
QD Chemistry
Extraction (Chemistry)
Online Access:http://ir.uitm.edu.my/id/eprint/41676/1/41676.pdf
http://ir.uitm.edu.my/id/eprint/41676/
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spelling my.uitm.ir.416762021-02-11T07:17:11Z http://ir.uitm.edu.my/id/eprint/41676/ Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli Zulkifli, Nur Afiqah Laboratories. General works QD Chemistry Extraction (Chemistry) The extracted roselle was characterized by brilliant red colour that rich in anthocyanin and can be used as a natural food colorants. There are many factors that influenced the stability of anthocyanin such as extraction time, temperature, pH and stability on light. The extraction of pigments were carried out by using acidified ethanol with 1.5 M HCl. The crude extraction of roselle was analysed and characterized using FTIR and UV-Vis spectrophotometer. The optimization of extraction time and temperature was studied at range from 1 to 5 hours and 25 °C to 140 °C respectively. The effect of pH on the anthocyanin content was studied at ranged from pH 1.5 to pH 12.0. Control and optimized sample were put under the light at 8 hours per day for 4 days to determine the stability on light. The results indicated that the optimum extraction time, temperature, and pH were 3 hours, 100 °C, and pH 1.5 respectively. The optimized sample exhibit the highest anthocyanin content for all 4 days compare to control. Overall, the highest total anthocyanin content was found to be 348 mgL-1 at optimum condition. 2017 Student Project NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/41676/1/41676.pdf Zulkifli, Nur Afiqah (2017) Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli. [Student Project] (Unpublished)
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic Laboratories. General works
QD Chemistry
Extraction (Chemistry)
spellingShingle Laboratories. General works
QD Chemistry
Extraction (Chemistry)
Zulkifli, Nur Afiqah
Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli
description The extracted roselle was characterized by brilliant red colour that rich in anthocyanin and can be used as a natural food colorants. There are many factors that influenced the stability of anthocyanin such as extraction time, temperature, pH and stability on light. The extraction of pigments were carried out by using acidified ethanol with 1.5 M HCl. The crude extraction of roselle was analysed and characterized using FTIR and UV-Vis spectrophotometer. The optimization of extraction time and temperature was studied at range from 1 to 5 hours and 25 °C to 140 °C respectively. The effect of pH on the anthocyanin content was studied at ranged from pH 1.5 to pH 12.0. Control and optimized sample were put under the light at 8 hours per day for 4 days to determine the stability on light. The results indicated that the optimum extraction time, temperature, and pH were 3 hours, 100 °C, and pH 1.5 respectively. The optimized sample exhibit the highest anthocyanin content for all 4 days compare to control. Overall, the highest total anthocyanin content was found to be 348 mgL-1 at optimum condition.
format Student Project
author Zulkifli, Nur Afiqah
author_facet Zulkifli, Nur Afiqah
author_sort Zulkifli, Nur Afiqah
title Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli
title_short Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli
title_full Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli
title_fullStr Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli
title_full_unstemmed Optimization of extraction time, temperature, pH and sta bility on light of roselle (hibiscus sabdariffa L.) / Nur Afiqah Zulkifli
title_sort optimization of extraction time, temperature, ph and sta bility on light of roselle (hibiscus sabdariffa l.) / nur afiqah zulkifli
publishDate 2017
url http://ir.uitm.edu.my/id/eprint/41676/1/41676.pdf
http://ir.uitm.edu.my/id/eprint/41676/
_version_ 1691735816086224896
score 13.211869

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