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A new design of groundwater sampling device and its application
Yih-jin Tsai1, Ming-ching T Kuo
1Department of Environmental Resources Engineering, Diwan College of Management, No. 87-1, Nansh Li, Madou, Tainan, Taiwan, China. yjtsai@dwu.edu.tw
Journal of Environmental Sciences (China)
|November 30, 2005
Summary
Atmospheric compounds contaminate groundwater samples. A new, inexpensive groundwater sampling device using a Teflon-valved glass bottle prevents contamination, ensuring accurate analysis of natural water quality.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Hydrogeology
Background:
- Groundwater samples are susceptible to contamination from atmospheric compounds.
- High background contaminant concentrations exacerbate sampling challenges.
Purpose of the Study:
- To develop an inexpensive and simple groundwater sampling method.
- To prevent atmospheric contamination of groundwater samples, especially under high contaminant conditions.
Main Methods:
- A novel groundwater sampling device was designed using a glass bottle with Teflon-lined valves.
- The device was connected to a peristaltic pump with Teflon tubing, ensuring no headspace.
- Samples were protected from infiltration using a PVC bag.
Main Results:
- Conventional sampling methods resulted in contamination of groundwater samples by atmospheric trichlorofluoromethane (CFC-11).
- The improved sampling method effectively eliminated contamination issues.
- The new method also addressed preservation and quantitative analysis challenges.
Conclusions:
- The developed groundwater sampling device significantly mitigates atmospheric contamination.
- This method enhances the reliability of groundwater quality assessments.
- The improved technique is suitable for analyzing natural waters with high contaminant levels.
