| An ultra high performance liquid chromatographic(UPLC) method was established for the simultaneous determination of eleven benzophenone and benzotriazole UV absorbents in coating samples.The emulsion paint samples were firstly dispersed with water,and subsequently extracted with ethyl acetate,while the wood varnish samples were extracted directly with acetonitrile.The extracts were separated on a C18 chromatographic column using acetonitrile-water mobile system with a variable flow rate,and detected with diode array detector(DAD).The results indicated that 11 analytes had good linear relationships(r≥0.999 0) in the concentration range of 0.1-50 mg/L.The limits of detection of the method(MLODs) were in the range of 10-30 mg/kg.Recoveries of 11 analytes at three spiked concentration slevels were in the range of 80.7%-107% with relative standard deviations(RSD,n=6) of 3.0%-8.7%.The method was simple and rapid,and was suitable for the simultaneous determination of eleven UV absorbents in coating samples with favorable recoveries and precisions. |