Optimization of the Method for Determining 16 Polycyclic Aromatic Hydrocarbons in Drinking Water by High-Performance Liquid Chromatography
Utilizing an optimized solid phase extraction-high performance liquid chromatography(SPE-HPLC)method equipped with a diode array detector coupled in series with a fluorescence detector,designed for the analysis of 16 Polycyclic Aromatic Hydrocarbons(PAHs)in drinking water.By refining the mobile phase flow rate,gradient elution program,and the detection wavelengths,this approach achieves successful separation and detection of the 16 specific PAH compounds.Experimental outcomes demonstrate a favorable linear relationship of the standard curves,with correlation coefficients exceeding 0.995.The detection limits range from 0.5～4.8 ng/L,while the quantitation limits span from 2.0 ng/L～19.2 ng/L.The relative standard deviations(RSD)across all measurements are within the scope of 0.13%～7.4%.Accuracy assessments revealed relative errors at low,medium,and high concentration levels varying between-1.3%～7.3%,-4.9%～2.6%,and-4.8%～4.2%,respectively.Furthermore,the recovery rates of spiked samples fall between 77.2%and 109%,comprehensively meeting the analytical requirements for the determination of 16 PAHs in drinking water.This methodology thus offers a reliable and sensitive tool for the monitoring of PAH contaminants in drinking water supplies.
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