Ionic liquid chemically bonded basalt fibers for in-tube solid-phase microextraction.

Ionic liquids have been widely used in different fields by advantage of their specific properties. In this work, 1-methyl-3-(3-trimethoxysilyl propyl)imidazolium chloride was prepared and chemically bonded onto basalt fibers for in-tube solid-phase microextraction. Through combining in-tube extraction device with high-performance liquid chromatography equipped with a diode array detector, an online enrichment and analysis method for eight polycyclic aromatic hydrocarbons was established under the optimum conditions. A good enrichment factor (52-814), good linearity (0.10-15 and 0.20-15 μg/L), low limits of detection (0.03-0.05 μg/L), and low limits of quantitation (0.10-0.20 μg/L) were achieved using a sample volume of 50 mL. Analysis method was applied to the real samples including the groundwater and wastewater from a chemical industry park, some target analytes were detected and the relative recoveries were in the range of 80.4-116.8%.