气相色谱法测定长江水体悬浮物和沉积物中有机氯农药的残留量

Gas chromatographic method for the determination of organochlorine pesticides insuspended solids and sediments of the Yangtze River

采用GC/MS定性 ,GC/ECD定量 ,对长江南京段悬浮物和沉积物中 8种有机氯农药 (OCPs)进行了分离测定 ,结果表明悬浮物中OCPs的含量分布按DDTs>HCB HCHs的顺序减小 ,DDTs的含量为 0 5 2— 1 15ng·L-1,HCB及HCHs的含量分别为 0 11— 0 48ng·L-1和 0 14— 0 47ng·L-1.沉积物中OCPs的含量分布按DDTs >HCB >HCHs的顺序减小 ,DDTs的含量为 0 2 1— 4 5 0ng·g-1,HCB及HCHs的含量分别为 0 14— 3 96ng·g-1和 0 18— 1 6 7ng·g-1.但总的来说 ,长江悬浮物和沉积物中有机氯农药在各采样点的分布特征较相似 .

Organochlorine pesticides(OCPs) in suspended solids and sediments of the Yangtze River were determined by gas chromatography with electron capture detector.The results indicated that OCPs in suspended solids followed the order of DDTs>HCBHCHs while in sediments followed the order of DDTs>HCB>HCHs.The distribution features of OCPs in suspended solids and sediments of the Yangtze River were similar among the investigated sampling stations.The results obtained by GC\|ECD showed that they were consistent with those analyzed by GC\|MS and HRGC\|HRMS method.