Effect of pH and UV exposure on the chromaticity stability of curcumin extracted from temu lawak (Curcuma xanthorrhiza Roxb.)

Abu Bakar, Ainaa Eliah and Othman, Rashidi and Mohd Latiff, Nur Hanie and Ramya, Razanah and Mohd Hatta, Farah Ayuni and Wan Sulaiman, Wan Syibrah Hanisah (2025) Effect of pH and UV exposure on the chromaticity stability of curcumin extracted from temu lawak (Curcuma xanthorrhiza Roxb.). Asian Journal of Environment, History and Heritage, 9 (1). pp. 1-14. ISSN 2590-4213 E-ISSN 2590-4310

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Abstract

The traditional uses of the family Zingiberaceae have a long history and include everything from folk medicine to culinary applications. Numerous ginger species have been the subject of numerous phytochemical, pharmacological, and molecular studies worldwide. Therefore, this study was implemented to explore and investigate in greater depth of curcumin extracted from ginger species in a wide range of rhizome flesh colour. UV-Vis spectrophotometer and CIELAB chromameter were used to measure the curcumin chromaticity stability. The chromaticity stability of curcumin extracted from temu lawak (Curcuma xanthorrhiza Roxb.), as analyzed using the CIELAB colour system, was found to be more stable at lower pH levels (3, 5, and 7) compared to higher pH levels (9 and 11), indicating that acidic to neutral conditions help preserve the colour integrity of curcumin. In addition the curcumin pigment was more stable in UV-B at higher concentrations as compared to UV-A.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Curcumin, chromaticity, carotenoid, natural pigment, temu lawak
Subjects:	BPC Science and Technology in Islam S Agriculture > S Agriculture (General) T Technology > TP Chemical technology > TP248.13 Biotechnology T Technology > TP Chemical technology > TP372.6 Halal food industry T Technology > TP Chemical technology > TP934 Paints, pigments, varnishes, etc
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Architecture and Environmental Design > Department of Landscape Architecture Kulliyyah of Architecture and Environmental Design
Depositing User:	Dr rashidi othman
Date Deposited:	08 Jul 2025 11:20
Last Modified:	08 Jul 2025 11:20
URI:	http://irep.iium.edu.my/id/eprint/121967

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