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Method development for trace analysis of heteroaromatic compounds in contaminated groundwater
S S Johansen1, A B Hansen, H Mosbaek
1Institute of Environmental Science and Engineering, Technical University of Denmark, Lyngby, Denmark.
Journal of Chromatography. A
|July 12, 1996
Summary
A new method accurately detects heteroaromatic compounds in contaminated groundwater. This technique uses liquid-liquid extraction and gas chromatography-mass spectrometry for sensitive and reproducible analysis.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
Background:
- Creosote contamination poses risks to groundwater quality.
- Heteroaromatic compounds are key pollutants in creosote.
Purpose of the Study:
- To develop a sensitive and reproducible analytical method for determining heteroaromatic compounds in creosote-contaminated groundwater.
- To compare different extraction techniques for optimal analyte recovery.
Main Methods:
- Liquid-liquid extraction using dichloromethane from weak basic solutions.
- Solid-phase extraction with reversed-phase bonded columns.
- Gas chromatography-mass spectrometry (GC-MS) with selective ion monitoring.
Main Results:
- Developed a method with a limit of quantitation of 50 ng/l.
- Achieved acceptable reproducibility with a mean relative standard deviation (R.S.D.) of 19%.
- Classical liquid extraction with dichloromethane demonstrated superior recovery and reproducibility compared to other methods.
Conclusions:
- The developed analytical method is suitable for sensitive determination of heteroaromatic compounds in contaminated groundwater.
- Classical liquid extraction with dichloromethane followed by GC-MS is an effective technique for this analysis.