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Determination of PAHs in River Water Using Bamboo Charcoal as a Solid-Phase Extraction Adsorbent by Synchronous Fluorescence Spectrometry

A solid-phase extraction (SPE) using bamboo charcoal as absorbent coupled with constant wavelength synchronous fluorescence (CWSL) analytical method was developed for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) in environmental water samples. A new method for simultaneous determination for sixteen kinds of polycyclic aromatic hydrocarbons (PAHs) in water was developed by constant wavelength synchronous fluorescence (CWSL) with bamboo charcoal solid phase extraction. The four main factors influencing on extraction efficiency, that is, type and volume of the elution solvent, sampling speed and volume were investigated. A solid-phase extraction with bamboo charcoal cartridges was carried out and the elution was performed with 15 mL of n-hexane. Sampling speed was 5 mL/min. Sampling volume was 500 mL. The linear response of this method was in the range of 0~1000ng/mL (r ≥ 0.9988), the relative standard deviations (RSDs) were in the range of 0.017%~4.12% (n = 6). The detection limits were in the range of 0.052~12.37ng /mL. .By using this method, real samples were determined directly and good results were obtained with the recoveries of 78.87%-107.9%in water from the Longjin river estuary of the provincial control section. The results showed the method was cheap, simple, and could used as an excellent alternative for the routine analysis in environmental field.