Simultaneous Determination of 7 Residual Benzene Series in Resin Crafts by Headspace Gas Chromatography
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KeyWord:headspace  gas chromatography  resin crafts  benzene series
黄宗平,黄长春,潘忠厚,林永谊,李丹,赖莺 1.厦门出入境检验检疫局;2.广东出入境检验检疫局
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      A method was developed for the simultaneous determination of 7 residual benzene series(BTEX),including benzene,toluene,ethylbenzene,p-xylene,m-xylene,o-xylene and styrene,in resin crafts by headspace gas chromatography(HG-GC).The extraction conditions,including solvent type,extraction temperature and time,were investigated,and the chromatographic conditions for HS-GC,including headspace bases,equilibrium temperature and time,sample granularity,were optimized.The results showed that 7 residual benzene series were preferably separated and good quantitative analyses were achieved under the headspace equilibrium temperature at 130 ℃ for 60 min,where the diameter of sample particle was smaller than 2mm and the DB-WAX capillary operation was chosen.Under the optimal conditions,the calibration curves were linear in the range of 0.1-500 μg with correlation coeficients higher than 0.999.The limits of quantitation(LOQs,S/N=10) of this method were between 0.1 μg?g-1 and 0.4 μg?g-1.The recoveries at three spiked levels ranged from 93% to 114% with relative standard deviations(RSDs) of 0.7%-4.8%.The established method was rapid and accurate,and was suitable for the analysis of benzene series in resin crafts.