A Fundamental Study on the Characteristics of Concentration Using a Blue Chitin Column for Polycyclic Aromatic Hydrocarbons in Water

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  • Fundamental Study on the Characteristics of Concentration Using a Blue Chitin Column for Polycyclic Aromatic Hydrocarbons in Water

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In order to evaluate the contribution of polycyclic aromatic hydrocarbons (PAHs) to mutagenicity of concentrates from water, the adsorption, elution and recovery behavior of 26 PAHs bearing 3 to 6 rings were investigated by the Blue Chitin column method. The adsorption rates of 22 PAHs, having three or more fused rings, to Blue Chitin were over 90%. Elution rates of PAHs with 4 and 5 rings and nitroarenes (NO2-PAHs) adsorbed on Blue Chitin were 50-70% with 100ml of methanol-ammonia (CH3OH-NH4OH) (50 : 1). However, elution rates of PAHs with 3 and 6 rings and aminoarenes (NH2-PAHs) were 0-40% with 100ml of the same mixed eluate. However, additional elution with 20ml of dichloromethane (CH2Cl2) following the elution with 100ml of CH3OH-NH4OH (50 : 1) raised the elution ratio by 10-30%. Elution employing CH2Cl2 was thus more effective for elution of PAHs adsorbed to Blue Chitin. Using this preconcentration method on a modified Blue Chitin column, fluoranthene, pyrene, benz [a] anthracene, chrysene, benzo [b]-fluoranthene, benzo [k] fluoranthene, benzo [a] pyrene and dibenz [a, h] anthracene in effluent water and fluoranthene, pyrene and benzo [k] fluoranthene in river water were detected. In summary, this preconcentration method using a modified Blue Chitin column was useful for concentration of PAHs and NO2-PAHs with 4 and 5 rings from environmental water.

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