The Malaysian Journal of Analytical Sciences 

About: The Malaysian Journal of Analytical Sciences is an academic journal. The journal publishes majorly in the area(s): Water quality & Catalysis. Over the lifetime, 367 publications have been published receiving 1213 citations.

Comparison of chemical profiles of selected gaharu oils from peninsular Malaysia

Abstract: Gaharu (agarwood) is a fragrant wood that is usually derived from the diseased timber of the genus Aquilaria (Thymelaeceae) and often occurs as dark coloured patches or streaks in the tree Due to its strong, unique scent and medicinal properties, gaharu oil is greatly valued as perfumery ingredient and incense Gaharu may be classified into various grades; Grade A, B, C and D and they are often graded according to the physical properties, gaharu formation and its unique scent The lower grades such as Grade C are often distilled to obtain gaharu oils As part of an on-going research on the chemical profiling of some Malaysian gaharu oils and evaluation of their potential beneficial properties; gaharu oils obtained from different sources were analysed and compared by GC and GC-MS Identification of the chemical components was based on comparison of calculated retention indices and mass spectral data with literature values Examination of the oils showed some variations and differences in terms of GC profiles, concentration and chemical components Majority of the essential oil profiles were complex and made up of sesquiterpenoids and their oxygenated derivatives However, common occurrences of chemical compounds such as 3-phenyl-butanone, α-guaiene, β-agarofuran, α-agarofuran, agarospirol and jinkoh-eremol were detected

Chemical constituents variations of essential oils from rhizomes of four zingiberaceae species.

Abstract: The essential oils were extracted using the hydrodistillation method from four Zingiberaceae species; Zingiber officinale var.rubrum, Zingiber amaricans, Kaempferia galanga, and Boesenbergia pandurata. Volatile components of all extracts were analyzed by gas chromatography-mass spectrometry (GC-MS) techniques. The major constituents of Zingiber officinale, Zingiber amaricans, Kaempferia galanga, and Boesenbergia pandurata were identified as E-citral (20.98%), zerumbone (40.70%), ethyl p-methoxycinnamate (58.47%) and camphor (57.97%), respectively. Kaempferia galanga and Zingiber amaricans were rich in sesquiterpenes whereas Boesenbergia pandurata and Zingiber officinale var. rubrum contained mostly monoterpenes.

Hydro geochemistry of groundwater in manukan island, sabah

Abstract: Geochemical data on dissolved major consituents in groundwater samples from Manukan island reveal the main processes responsible for their geochemical evolution. The results of analysis showed that the groundwater was chemical highly enriched with Na + and Cl - an indication of seawater intrusion into the aquifer as also suported from the Na-Cl signature on the Piper diagram. From the PHREEQC simulation model, calcite, dolomite and aragonite solubility showed positive values of the saturation indeces (SI) indicating supersaturation which lead to mineral precipitation condition of water by these minerals.