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Trace level perchlorate analysis by ion chromatography-mass spectrometry
Johnson Mathew1, Jay Gandhi, Joe Hedrick
1Houston Laboratory, Management Division, Environmental Protection Agency, 10625 Fallstone, Houston, TX 77099, USA. mathew.johnson@epa.gov
Journal of Chromatography. A
|August 19, 2005
Summary
This study demonstrates a new method for detecting perchlorate contamination in water. Ion chromatography-mass spectrometry offers a lower detection limit for perchlorate, improving accuracy in complex samples.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
Background:
- Perchlorate is a common rocket propellant ingredient, leading to environmental contamination.
- Perchlorate contamination has been detected in aquifers, crops, and water sources.
- Existing methods like EPA 314 have limitations in complex matrices, causing potential false results.
Purpose of the Study:
- To develop a more sensitive method for perchlorate detection.
- To overcome limitations of current analytical techniques for perchlorate in high ionic matrices.
Main Methods:
- Utilizing ion chromatography-mass spectrometry (IC-MS).
- Analyzing water samples with complex ionic compositions.
Main Results:
- Achieved a lower detection limit for perchlorate compared to traditional methods.
- Demonstrated the effectiveness of IC-MS in high ionic strength samples.
- Reduced the likelihood of false positives and negatives in perchlorate analysis.
Conclusions:
- Ion chromatography-mass spectrometry is a superior method for accurate perchlorate detection.
- This technique is crucial for monitoring perchlorate contamination in environmental and drinking water.
- Improved detection capabilities aid in assessing risks associated with perchlorate exposure.