沿海港口表层沉积物中三丁基锡化合物的顶空固相微萃取气相色谱测定

Determination of Tributyltin Compounds in Surface Sediments of Harbour by Gas Chromatography with Headspace Solid Phase Microextraction

利用顶空固相微萃取与气相色谱火焰光度检测法测定广东汕头港表层沉积物中的三丁基锡化合物(TBT) ,探索了样品的最佳超声处理时间、缓冲溶液 pH值及萃取时间 ,该法可方便、灵敏地测定沉积物中的三丁基锡 ,检出限达到0.28×10 -9(w)。

Capillary gas chromatography combined with headspace solid phase microextraction and flame photoˉmetric detection was used to analyze tributyltin(TBT)compounds in surface sediments of Shantou Harbour.Factors affecting the recovery of TBT such as ultrasonic treatment time of sample,pH value of derivatizing reagent and extraction time were evaluated.The proposed method proved to be simple and sensitive with detection limit of0.28×10 -9 (w)for TBT.