A new design of groundwater sampling device and its application
Yih-Jin Tsai , Ming-Ching T. Kuo
DOI:
Received December 20, 2004,Revised March 07, 2005, Accepted , Available online
Volume 17,2005,Pages 838-841
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Compounds in the atmosphere contaminate samples of groundwater. An inexpensive and simple method for collecting water samples is developed to prevent contamination when the background concentration of contaminants is high. This new design of groundwater sampling device involves a few glass sampling bottles with a Teflon-lined valve at each end. A cleaned and dried sampling bottle was connected to a low flow-rate peristaltic pump with Teflon tubing and was filled with water. No headspace volume was remained in the sampling bottle. The sample bottle was then packed in a PVC bag to prevent the target component from infiltrating into the water sample through the valves. In this study, groundwater was sampled at six wells using both the conventional method and the improved method. The analysis of CFC-11 concentrations at these six wells indicates that all the groundwater samples obtained by the conventional sampling method were contaminated by CFC-11 from the atmosphere. The improved sampling method greatly eliminated the problems of contamination, preservation and quantitative analysis of natural water.
