The Malaysian Journal of Analytical Sciences Vol 11 No 1 (2007): 193 – 197

 

 

ACCELERATED SOLVENT EXTRACTION METHOD WITH ONE-STEP CLEAN-UP FOR HYDROCARBONS IN SOIL

 

Nurulhuda Mamat Ghani, Norashikin Saim*, Rozita Osman and Zuraidah Abdullah Munir

 

Fakulti Sains Gunaan, Universiti Teknologi MARA

40450 Shah Alam, Selangor

 

*Corresponding author: rozit487@salam.uitm.edu.my

 

Abstract

The application of  accelerated solvent extraction (ASE)  using hexane combined with  neutral silica gel and  sulfuric acid/ silica gel ( SA/SG) to remove impurities prior to analysis by gas chromatograph with flame ionization detector (GC-FID) was studied. The efficiency of extraction was evaluated based on the three hydrocarbons; dodecane, tetradecane and pentadecane sp iked to soil sample. The effect of ASE operating conditions (extraction temperature, extraction pressure, static time) was evaluated and the optimized condition obtained from the study was extraction temperature of 160 ºC, extraction pressure of 2000 psi with 5 minutes static extraction time.   The developed ASE with one-step clean-up method was  applied in the extraction of hydrocarbons from spiked soil and the amount extracted was comparable to ASE extraction without clean-up step with the advantage of obtaining “cleaner” extract with reduced  interferences.   Therefore in the developed method, extraction and clean-up for hydrocarbons in soil can be achieved rapidly and efficiently with reduced solvent usage.

 

Keywords: Accelerated solvent extraction, hydrocarbons, flame ionization detector

 

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