| POCIS采样技术应用于九龙江流域水环境中雌激素的检测 |
| 摘要点击 2726 全文点击 1784 投稿时间：2013-04-13 修订日期：2013-06-03 |
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| 中文关键词 雌激素 被动采样 极性化合物一体化采样器 温度 九龙江 |
| 英文关键词 estrogens passive sampler polar organic chemical integrative sampler (POCIS) temperature Jiulong River |
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| 中文摘要 |
| 极性有机物一体化采样器（POCIS）作为富集水体中有机物的新型采样技术，可以反映目标物在被测水体中的时间权重浓度，因此在环境监测中是对主动采样方式的重要补充. 本研究采用POCIS进行了4种固醇类雌激素化合物（雌酮、雌二醇、雌三醇及雌炔醇）的富集动力学，以及温度和目标物浓度对POCIS富集雌激素影响的实验室模拟研究. 结果表明，POCIS对目标化合物的富集放置时间7 d内呈现显著的线性关系（r2≥0.9881，P<0.001）. 温度对目标物在POCIS上富集的影响比较显著（RSD>12%），随着温度的升高，目标化合物在POCIS上的采样速率减小. 而目标物浓度对POCIS富集没有显著的影响（RSD<5%）. 将所建立的POCIS采样装置应用于九龙江流域的现场环境中，发现利用POCIS估算出的目标物时间权重浓度与主动采样测定的浓度具有显著的相关性（r2=0.7209，P<0.001），验证了POCIS在实际环境中的可应用性. |
| 英文摘要 |
| Polar organic chemical integrative sampler (POCIS) has been recently documented for the detection of polar organic compounds in the environment to achieve a time weighted average concentration. So it is an important complimentary for spot sampling. POCIS was examined for its sampling efficiency for four kinds of estrogenic compounds (EDCs: estrone, 17α-ethynylestradiol, 17β-estradiol, estriol) in this study. The kinetic studies showed an integrative uptake up to 7 d and the sampling rate decreased as the temperature increased(RSD>12%). As for different concentrations of target compounds, the sampling rate was not affected by the concentrations(RSD<5%). After laboratory experiments, an environmental field study was performed in Jiulong River. The results showed that there was a relatively good correlation between the measured and calculated values (r2=0.7209, P<0.001). It demonstrated that POCIS can be used in aquatic field systems. |
