Rapid Determination of Seven Naphthalenediols with Vortex-assisted Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop and High Performance Liquid Chromatography

KeyWord:Vortex-assisted dispersive liquid-liquid microextraction based on solidification of floating organic drop(VA-DLLME-SFO)  naphthalenediols  water sample  high performance liquid chromatography(HPLC)

Abstract:

      A simple and rapid method for the preconcentration and determination of seven naphthalenediols in water samples with vortex assisted dispersive liquid-liquid microextraction based on solidification of floating organic drop(VA-DLLME-SFO) and high performance liquid chromatography(HPLC) was established.The target compounds in water samples were synergistically extracted in vortex dispersed mode,with ethyl ether-dodecanol as binary micro-extraction agent,then separated on a C18 chromatographic column and determined by HPLC.The kind and dosage of extraction agent,extraction time,dosage of sodium chloride and other conditions were optimized.The optimum extraction conditions were as follows:extraction agent:100 ¦ÌL ethyl ether-50 ¦ÌL dodecanol,amount of sodium chloride:0.2 g/mL,vortex extraction time:3 min.Under the optimized conditions,the calibration curves of 7 naphthalenediols were linear in the certain concentration range with correlation coefficients greater than 0.997.The detection limits of the method(S/N=3) were between 1.7 ¦Ìg/L and 6.0 ¦Ìg/L.The average recoveries of naphthalenediols at three spiked levels in water sample ranged from 82.1% to 106.0% with relative standard deviations(RSD,n=5) of 1.2%-4.1%.The inter RSDs(n=5) ranged from 2.5% to 5.7% at the middle spiked level.The developed method was simple and environment-friendly,and the vortex-assisted dispersion could largely enhance the mass transfer rate and shorten the required extraction time.Therefore,the method was suitable for the detection of naphthalenediols in water samples.