The Malaysian Journal of Analytical Sciences Vol 13 No 1 (2009): 141 – 145

 

 

 

COMPARISON OF PRESSURIZED LIQUID EXTRACTION WITH SOXHLET EXTRACTION IN THE DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN SOIL

 

Noorashikin Md Saleh¹*, M. Marsin Sanagi²

 

¹Department of Chemical Sciences, Faculty of Science and Technology,

Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia.

 ²Department of Chemistry, Faculty of Science,

Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia.

 

*Corresponding author: noorashikin@umt.edu.my

 

Abstract

Pressurized liquid extraction (PLE) method was developed by using conventional high performance liquid chromatography instrument and the performance of the PLE system was tested using environmental soil samples were collected at different places from FELDA palm oil plantation at Serting, Negeri Sembilan. PLE method showed good reproducibility for the majority of PAHs tested. Fluoranthene showed the highest recovery (94.4%) followed by fluorene (92.3%), phenanthrene (88.5%) and naphthalene (81.5%). High temperature at 180°C along with polar solvent dichloromethane-acetone was found to be necessary to extract the PAHs quantitatively from soils. The PAHs detected in the samples are phenanthrene (4.1 to 49.4 µg/mL), fluorene (10.1 µg/mL and 11.6 µg/mL) and fluoranthene (2.2-60.7 µg/mL. Naphthalene was not detected in the soil samples. The results obtained indicate that the developed method can be applied to the analysis of PAHs in soils.

 

Keywords: Pressurized liquid extraction (PLE), Polycyclic Aromatic Hydrocarbons (PAHs), high temperature high performance liquid chromatography (HT- HPLC).

 

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