利用自制的吹扫/捕集-热脱附装置,考察了7种单一吸附剂和4种混合吸附剂对水中痕量挥发性有机物的富集,结果证明,Tenax GC和活性炭组成的混合吸附剂使用范围广,回收率明显高于单一吸附剂,吸附剂借助N_2干吹可除去水蒸气.混合吸附剂可望在环境大气和汽提法分析水样中得到广泛的应用. The enrichment of trace amounts of volatile organic compounds in water by seven kinds of single adsorbents and four kinds of mixed adsorbents was investigated by a homemade purge / trap-thermal desorption device. The results showed that the mixed adsorbents composed of Tenax GC and activated carbon With a wide range of applications, the recovery rate is obviously higher than that of a single adsorbent, and the adsorbent can remove the water vapor through the drying of N_2. The mixed adsorbent is expected to be widely used in the analysis of water samples by ambient atmosphere and stripping.