Automatic Determination of Mercury in Environmental Samples
Author Information
Author(s): Maria Cristina Canela, Wilson F. Jardim, Jarbas J. R. Rohwedder
Primary Institution: Instituto de Química, Universidade Estadual de Campinas
Hypothesis
An automatic flow injection system can improve the determination of mercury in environmental samples.
Conclusion
The automated system significantly improved the detection limit for mercury, allowing for levels as low as 10 ng/L to be determined.
Supporting Evidence
- The introduction of an amalgamation column improved the detection limit for mercury.
- The automated system allows for the determination of mercury levels 20 times lower than previous methods.
- Results showed good reproducibility with a relative standard deviation of 5%.
- Mercury concentrations in natural waters were quantified above the detection limit of the method.
Takeaway
Scientists created a machine that can quickly and accurately measure mercury in water, fish, and hair samples, helping to keep our environment safe.
Methodology
An automatic flow injection system using cold vapour atomic absorption spectrophotometry (CVAAS) was developed to determine mercury levels in various samples.
Limitations
The system has a low analytical rate compared to other methods and may require additional cleaning for decontamination.
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