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1. 发明授权

US5804743A Downhole passive water sampler and method of sampling 失效
标题翻译：井下无源水采样器及采样方法
公开(公告)号：US5804743A
公开(公告)日：1998-09-08
申请号：US700047
申请日：1996-08-20
申请人： Don A. Vroblesky , William Thomas Hyde, Jr.
发明人： Don A. Vroblesky , William Thomas Hyde, Jr.
IPC分类号： E02D1/06 , E21B49/08 , G01N1/34 , G01N33/18
CPC分类号： E02D1/06 , E21B49/082 , G01N1/34 , G01N2001/4016 , G01N33/18
摘要： An improved method and apparatus for monitoring the concentration of contaminants, including volatile organic compounds, in groundwater is provided comprising a semipermeable membrane defining an inner chamber therein. The membrane is permeable to contaminants but impermeable to a reference fluid, which is preferably distilled water. The method of sampling comprises placing the semipermeable membrane, which contains the reference fluid, in contact with contaminated groundwater, thereby allowing contaminants to diffuse through the semipermeable membrane and into the inner chamber. Sufficient time is allowed for the contaminant concentrations in the groundwater and in the reference fluid to reach equilibrium. The semipermeable membrane is then removed from contact with the groundwater, and a sample withdrawn from the inner chamber for analysis, preferably through a port communicating with the inner chamber.
摘要翻译：提供了一种改进的用于监测地下水中污染物（包括挥发性有机化合物）浓度的方法和装置，其包括在其中限定内室的半透膜。膜对污染物是可渗透的，但是对于优选蒸馏水的参考流体是不可渗透的。采样方法包括将含有参考流体的半透膜与污染的地下水接触，从而允许污染物扩散通过半透膜并进入内室。足够的时间允许地下水和参考流体中的污染物浓度达到平衡。然后将半透膜从与地下水接触中除去，并且从内室取出用于分析的样品，优选通过与内室连通的端口。

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