Graphene based solid‐phase extraction disk for fast separation and preconcentration of trace polycyclic aromatic hydrocarbons from environmental water samples
Graphene has great potentials for the use in sample preparation due to its ultra high specific surface area, superior chemical stability and excellent thermal stability. In our work, a novel graphene based solid‐phase extraction disk was developed for separation and preconcentration of trace polycyclic aromatic hydrocarbons from environmental water samples. Based on the strong π‐π stacking interaction between the analytes and graphene, the analytes extracted by graphene were eluted by cyclohexane and then determined by gas chromatography‐mass spectrometry. Under the optimized conditions, high flow rate (30 mL min−1) and sensitivity (0.84–13 ng L−1) were achieved. The proposed method was successfully applied to the analysis of real environmental water samples with recoveries ranging from 72.8 to 106.2%. Furthermore, the property of anti‐clogging and reusability was also improved. This work reveals great potentials of graphene based solid‐phase extraction disk in environmental analytical.
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