Chemistry & Chemical Engineering Research Center of Iran

Ionic liquid based rotative liquid liquid microextraction combined with high performance liquid chromatography for determination of trace levels of polycyclic aromatic hydrocarbon

Document Type : Research Articles

Abstract
A fast, simple and eco-friendly microextraction method termed ionic liquid-rotative liquid-liquid microextraction (IL-RLLME), coupled with high performance liquid chromatography (HPLC) was developed for preconcentration and determination of polycyclic aromatic hydrocarbons (PAHs) in environmental waters and food samples. The combination of ionic liquid-rotative liquid-liquid microextraction method with HPLC-DAD makes it possible to use of the less volume of the extraction phase and also simultaneous preconcentration and determination of several analytes. Different ionic liquids (ILs) were evaluated for preconcentration procedure and 1-hexyl-3-methylimidazolium bis (trifluoromethylsolfonyl) imid [C6mim][NTf2] was chosen as most suitable extraction solvent. In addition, various parameters affecting the extraction efficiency such as, volume of extraction solvent, extraction time, and speed were optimized. Under the optimized conditions, the calibration curves gave high levels of linearity having correlation coefficients (R) greater than 0.99 and the limits of detection (LODs), ranging from 0.005-0.013 μg L-1. The relative standard deviations (RSDs) were in the range of 1.36-2.40 % (n = 8) for 100 mg L-1 mixed solution of PAHs. The proposed method provided high enrichment factors in the range of 590–1431 for PAHs.

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Articles in Press, Accepted Manuscript
Available Online from 12 August 2025