| A kind of 2D-［Zn（benzotriazole）2］n coordination polymer was synthesized,and used to concentrate and extract six heavy polycyclic aromatic hydrocarbons（PAHs） in environmental water samples.The prepared coordination polymer was characterized by X-ray powder diffraction（XRD）,scanning electron microscope（SEM） and elemental analysis,and the polymer showed a strong affinity to aromatics.In the experiment, amount of coordination polymer, washing solvent, kind and usage of eluent, flow rate and breakthrough volume were all investigated.The final result was compared to the C18 solid phase extraction（SPE） column with the same sample volume and spiked level,thus an analytical method by gas chromatography-mass spectrometry（GC-MS） was established to determinate six PAHs in water samples.A good extraction efficiency could be obtained by using 200 mg coordination polymer as SPE adsorbent,10% methanol as washing solvent,0.5 mL acetone and 5 mL dichloromethane as eluent,with a flow rate of 4 mL/min and a sample volume of 200 mL.Good linearities were obtained over the ranges of 20-1 000 μg/L for fluranthene（Flan）,benzo［b］ fluoranthene（BbF） and benzo［g,h,i］perylene（BghiP）,and 10-500 μg/L for benzo［k］ fluranthene（BkF）,benzo［a］pyrene（BaP） and indeol［1,2,3 Cd］pyrene（InP）,with correlation coefficients（r2） of 0.996 8-0.999 3.The detection limits ranged from 0.45 ng/L to 10.7 ng/L.The spiked recoveries of six PAHs were in the range of 77%-112% with RSDs of 3.8%-8.5%.The established method showed advantages of low-cost and high-sensitivity,and could meet the requirements for determination of six PAHs in real environmental water samples. |