EFFECT OF pH AND UV EXPOSURE ON THE CHROMATICITY STABILITY OF CURCUMIN EXTRACTED FROM TEMU LAWAK (Curcuma xanthorrhiza Roxb.)

(KESAN pH DAN PENDEDAHAN UV TERHADAP KESTABILAN KROMATIK EKSTRAK KURKUMIN DARIPADA TEMULAWAK (Curcuma xanthorrhiza ROXB.)

Authors

  • Ainaa Eliah Abu Bakar
  • Rashidi Othman
  • Nur Hanie Mohd Latiff
  • Razanah Ramya
  • Farah Ayuni Mohd Hatta
  • Wan Syibrah Hanisah Wan Sulaiman

Abstract

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.

Keywords: Curcumin, chromaticity, carotenoid, natural pigment, temu lawak

 

Abstrak

Kegunaan tradisional keluarga Zingiberaceae telah lama wujud dan merangkumi pelbagai aspek daripada perubatan tradisional hingga ke aplikasi kulinari. Pelbagai spesies halia telah menjadi subjek kajian fitokimia, farmakologi dan molekul di seluruh dunia. Oleh itu, kajian ini dilaksanakan untuk meneroka dan menyelidik dengan lebih mendalam tentang kurkumin yang diekstrak daripada spesies halia dengan pelbagai warna isi rizom. Spektrofotometer UV-Vis dan kromameter CIELAB digunakan untuk mengukur kestabilan kromatik kurkumin. Kestabilan kromatik kurkumin yang diekstrak daripada temu lawak (Curcuma xanthorrhiza Roxb.), seperti yang dianalisis menggunakan sistem warna CIELAB, didapati lebih stabil pada tahap pH yang rendah (3, 5 dan 7) berbanding tahap pH yang tinggi (9 dan 11). Ini menunjukkan bahawa keadaan berasid hingga neutral membantu mengekalkan integriti warna kurkumin. Selain itu, pigmen kurkumin lebih stabil di bawah sinaran UV-B pada kepekatan yang lebih tinggi berbanding UV-A. 

Kata Kunci: Kurkumin, Kromatisiti, karotenoid, pewarna alami, temu lawak

Author Biographies

Ainaa Eliah Abu Bakar

International Institute for Halal Research and Training,
International Islamic University Malaysia,

Rashidi Othman

Professor
Herbarium Lab Unit,
Department of Landscape Architecture,
International Islamic University Malaysia

Nur Hanie Mohd Latiff

International Institute for Halal Research and Training,
International Islamic University Malaysia

Razanah Ramya

Research fellow
Institute of the Malay World and Civilization,
Universiti Kebangsaan Malaysia

Farah Ayuni Mohd Hatta

Institute of Islam Hadhari,
Universiti Kebangsaan Malaysia

Wan Syibrah Hanisah Wan Sulaiman

International Institute for Halal Research and Training,
International Islamic University Malaysia

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Published

2025-06-30

Issue

Vol. 9 No. 1 (2025)

Section

Environment & Landscape

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