Atomic fluorescence determination of mercury in fresh water ecosystems
1995
Measuring Mercury in Fresh Water
publication
Evidence: high
Author Information
Author(s): Randy Knox, William R. Kammin, David Thomson
Primary Institution: Washington State Department of Ecology
Hypothesis
Can atomic fluorescence detect low levels of mercury in fresh water ecosystems?
Conclusion
The study successfully demonstrated a method to detect mercury levels below EPA criteria in fresh water.
Supporting Evidence
- Method detection limits for fresh water were determined to be less than 1 ng/l.
- All mercury levels in sampled rivers were below the EPA chronic water quality criteria.
- The method showed mean recoveries within US EPA acceptance criteria.
- Using purified reagents resulted in undetectable levels of mercury in procedural blanks.
Takeaway
This study found a way to measure tiny amounts of mercury in water, which helps keep our rivers and lakes safe.
Methodology
The method involved cold vapor generation of mercury followed by fluorescence detection, using a bromine oxidation technique for sample preparation.
Limitations
The study did not test the method on filtered seawater, which may affect results.
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