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Determination of Volatile Organic Compounds in Petroleum Companies using Liquid-Liquid Extraction

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Abstract (2. Language): 
The recovery study of volatile organic compounds from effluents of petroleum companies in Ilorin East Local Government Area and its effect on the environmental matrix- surface water, soil, sediment and plant were sampled. The liquid-liquid extraction procedure of two organic solvent (Hexane: Dichloromethane) (50 ml: 50ml) was employed to remove volatile organic compounds from matrix so as to obtain a good recovery and repeatability at 0.01μg/l, 0.02μg/l and 0.05μg/l respectively. Sediment, soil and leaf of plant samples (10 g) were dried and soaked in hexane prior to extraction procedures, after which it was totaled into a 2 ml vial for Gas chromatography analysis. At 0.05μg/l obtained a percentage mean recovery and relative standard deviation for effluent water (82.7±2.5 – 95.0 ±1.0 %), surface water (62.3±2.5 – 97.7±4.2 %), soil (72.7±2.1 – 96.3±3.8 %), sediment (85.7±3.2 – 91.7±2.5 %) and plant (79.3±2.5 – 99.3±2.0 %). Correlation analysis was carried out to establish a relationship between effluent and other matrix, at 0.02 μg/l percentage mean recovery effluent has effect on the sediment at that concentration. The remaining concentration levels did not show any significant relationship with the effluent variables.
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