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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 24, Number 1
BKCSDE 24(1)
January 20, 2003 

Determination of Normal Saturated- and Polycyclic Aromatic Hydrocarbons in the River Water of Bangladesh by Liquid-Liquid Extraction and Gas Chromatography
M. A. Mottaleb, D. K. Sarma, S. Sultana, M. M. Husain, S. M. M. Alam, S. M. Salehuddin
Saturated hydrocarbons, PAH, Gas chromatography, River water, Extraction and preconcentration
A liquid-liquid extraction followed by evaporative concentration method was used to determine the concentration of normal, or straight chain, saturated hydrocarbons (NSH) (C10 to C24) and polycyclic aromatic hydrocarbons (PAH) here defined as: fluorene, anthracene, pyrene, chrysene and perylene, in the Buriganga River water of Bangladesh. Samples were collected from 5 and 25 cm depth of water at the southern, middle and northern parts of the river at Postogolla, Sadarghat and Sowarighat stations. Hydrocarbons were extracted from 450 mL of water into 75 mL n-hexane and then concentrated into 1 or 2 mL solution by evaporation. These solutions were analyzed by gas chromatography. The highest and lowest concentrations were determined as 257 mg L-1 for C13 and 0.24 mg L-1 for C22 at 5 cm depth of water, at the northern part of the Sowarighat and southern part of the Postogolla, respectively. This method could allow the analysis of water for C22 as low as 0.24 mg L-1.
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