中文摘要：

与传统采样技术相比,固相微萃取法（SPME）作为一种非破坏性的采样方法具有萃取体积小、萃取时间短的优点,自问世以来便被广泛应用。SPME的萃取特性受涂层表面污染物对流效应的影响,但以往研究却少有提及。通过引入对流传质系数,本文推导了运用SPME对VOC和SVOC浓度进行萃取分析的解析模型。利用该模型,可得到被萃取样品中的VOC和SVOC浓度。此外,模型还可用于测定SPME采样的关键参数——分配系数和扩散系数（称为标定过程）。实验中对一种典型的SVOC（邻苯二甲酸二异辛酯）进行了SPME萃取。分析表明,模型预测值和实验数据能够很好地吻合,从而证明了模型和标定方法的有效性。

英文摘要：

Compared with prior sampling methods,solid-phase micro-extraction（SPME） is taken as a non-destructive sampling method with the merits of small extraction volume and short extraction time,which is widely applied since its invention.The extraction characteristic of SPME is affected by the convective effect of pollutants along the coating surface,however,this effect has seldom been mentioned in previous studies.Allowing forthe convective mass transfer coefficient,this paper develops an analytical model to extract the samples for VOC and SVOC by SPME.With this model,the VOC and SVOC concentrations in the extraction samples can be easily obtained.Moreover,this model can be applied to measure the key parameters,i.e.,the partition and diffusion coefficients（called calibration process）.Tests of SPME sampling for a typical SVOC,di-2-ethylhexyl phthalate（DEHP）,were conducted.Good agreement between model prediction and experimental data is obtained,which validates the reliability of the model as well as the calibration method.