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Abstract
Micellar electrokinetic chromatography with a photodiode array detector has been employed for the separation of nitro-polycyclic aromatic hydrocarbons, including 2-nitro-fluorene, 9-nitro-anthracene, 3-nitro-fluoranthene and 1-nitro-pyrene. Sodium deoxycholate was used as a micelle-forming reagent. The effects of β-cyclodextrin and the organic modifiers, methanol, acetonitrile and dimethylformamide, on the resolution of the nitro-polycyclic aromatic hydrocarbons were studied. Acetonitrile and dimethylformamide were useful modifiers to separate highly hydrophobic nitro-polycyclic aromatic hydrocarbons. Structure isomers, 3-nitro-fluoranthene and 1-nitro-pyrene, were not separated using β-cyclodextrin as modifier. The influence of temperature on the resolution of the nitro-polycyclic aromatic hydrocarbons were also investigated.