Citation
Khairul A., . and Janna Ong Abdullah, . and Maziah M., . and Mohd Y., . (2004) Flower pigment analysis of Melastoma malabathricum. [Proceedings Paper]
Abstract
Anthocyanin is among the permitted pigments that can be used as food colourant and a potential replacement for synthetic dyes. The objective of this study is to detect the colour pigment anthocyanin in Melastoma malabathricum flower and study their stability level in extracted form. The data showed that S2 flower developmental stage contains the highest anthocyanin content. The anthocyanin content in extracts kept in darkness was quite stable throughout the experiments 26 days except for extracts exposed to light lost more than 50 of their anthocyanin contents. It was found that the anthocyanin concentration decreased as the pH values increased from 0.5 to 3.0 concomitant with extract fading in colour. Extracts stored at 31C showed higher degradation levels compared to keeping at 4C. From the study we found that the suitable storage condition for coloured anthocyanin pigments in extracted form was in acidic solution pH 0.5 and 1.0 maintained in the dark at 4C.
Download File
Full text available from:
|
Abstract
Anthocyanin is among the permitted pigments that can be used as food colourant and a potential replacement for synthetic dyes. The objective of this study is to detect the colour pigment anthocyanin in Melastoma malabathricum flower and study their stability level in extracted form. The data showed that S2 flower developmental stage contains the highest anthocyanin content. The anthocyanin content in extracts kept in darkness was quite stable throughout the experiments 26 days except for extracts exposed to light lost more than 50 of their anthocyanin contents. It was found that the anthocyanin concentration decreased as the pH values increased from 0.5 to 3.0 concomitant with extract fading in colour. Extracts stored at 31C showed higher degradation levels compared to keeping at 4C. From the study we found that the suitable storage condition for coloured anthocyanin pigments in extracted form was in acidic solution pH 0.5 and 1.0 maintained in the dark at 4C.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. QK710.2 M239 2004 Call Number |
| AGROVOC Term: | Melastomataceae |
| AGROVOC Term: | Flowers |
| AGROVOC Term: | Anthocyanins |
| AGROVOC Term: | Flower extracts |
| AGROVOC Term: | Petals |
| AGROVOC Term: | Colour |
| AGROVOC Term: | Storage stability |
| AGROVOC Term: | Storage containers |
| AGROVOC Term: | Low temperature |
| AGROVOC Term: | Plant developmental stages |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:15 |
| URI: | http://webagris.upm.edu.my/id/eprint/12744 |
Actions (login required)
 |
View Item |
