Malaysian Journal of Analytical Sciences Vol 19 No 5 (2015): 942 - 950

 

 

 

sedimentary fatty alcoholS IN KAPAS ISLAND, TERENGGANU

 

(Alkohol Lemak Sedimen Di Pulau Kapas, Terengganu)

 

Noor Farahin Amiruddin¹, Mohamad Iznul Mua’zim Mohamad Zabidi¹, Nurul Fathihah Mt. Nanyan¹,

Masni Mohd Ali^1,2*

 

¹School of Environmental and Natural Resource Sciences, Faculty of Science and Technology,

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

²Associate Researcher, Institute of Oceanography and Environment,

Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia

 

*Corresponding author: masni@ukm.edu.my

 

 

Received: 27 May 2015; Accepted: 12 August 2015

 

 

Abstract

A geochemical study was carried out to identify the composition and sources of fatty alcohols in Kapas Island, Terengganu, Malaysia. Fatty alcohols in surface sediments were extracted and analyzed using Gas Chromatography – Mass Spectrometry (GC-MS). A total of 23 fatty alcohol compounds were identified in the Kapas Island sediment. Total concentrations of fatty alcohols ranged from 0.53 to 21.31 ng/g dry weight and the highest total concentration was found at S2, which is probably due to its location profile that is located north of Kapas Island which is close to several small islands. The short chain/long chain fatty alcohol ratio and alcohol source index (ASI) were used together to identify the dominant input in Kapas Island. Kapas Island sediments contained a mixture of organic sources, of which terrestrial sources were indicated to be the most abundant sources in these marine sediments.

 

Keywords: fatty alcohols, surface sediments, Kapas Island

 

Abstrak

Sebuah kajian geokimia telah dijalankan untuk mengenal pasti komposisi dan sumber alkohol lemak di Pulau Kapas, Terengganu, Malaysia. Alkohol lemak di dalam sedimen permukaan diekstrak dan dianalisis menggunakan Kromatografi Gas – Spektrometri Jisim (GC-MS). Sebanyak 23 sebatian alkohol lemak telah dikenal pasti di dalam sedimen Pulau Kapas. Jumlah kepekatan alkohol lemak di antara 0.53 hingga 21.31 ng/g berat kering dan jumlah kepekatan tertinggi adalah di S2, yang berkemungkinan disebabkan oleh profil kedudukannya iaitu terletak di bahagian utara Pulau Kapas yang berdekatan dengan beberapa buah pulau kecil. Nisbah rantai pendek/rantai panjang alkohol lemak dan indeks sumber alkohol (ASI) telah digunakan bersama untuk mengenal pasti input dominan di Pulau Kapas. Sedimen Pulau Kapas mengandungi kepelbagaian sumber organik, yang menunjukkan sumber terestrial merupakan sumber yang paling banyak terdapat di dalam sedimen marin ini.

 

Kata kunci: alkohol lemak, sedimen permukaan, Pulau Kapas

 

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