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提取海河河口水体表层底质中的富里酸（ＦＡ）和胡敏酸（ＨＡ），对其性能进行了表征。本文所用提取方法比较接近于原位提取，具有较好的重现性；海河河口闸内、闸外水体表层底质中的ＦＡ、ＨＡ状况大致相同，稍有差异；所得ＦＡ和ＨＡ均含有烷基和稳定自由基。
The fulvic acid (FA) and humic acid (HA) in the surface sediment of the Haihe River Estuary were extracted and its performance was characterized. The extraction methods used in this paper are close to in situ extraction and have good reproducibility. The FA and HA in the surface sediment of the floodgates in the estuary and in the estuary of the Haihe Estuary are roughly the same with slight differences. The obtained FA and HA both contain alkane Base and stabilize free radicals.