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An Innovative Method to Generate Bromine Monochloride for Trace Hg Analysis
Jan Rohovec1, Tomáš Navrátil2, Tereza Nováková1
1Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, Prague 6, 165 00, Czech Republic.
A new, safe, and fast method generates bromine monochloride (BrCl) solutions from dibromodimethylhydantoin (DBDMH) and HCl. The resulting BrCl reagent meets US EPA standards for trace mercury analysis.
Area of Science:
- Analytical Chemistry
- Environmental Chemistry
Background:
- Accurate mercury analysis requires high-purity reagents.
- Traditional methods for preparing bromine monochloride (BrCl) solutions can be complex and hazardous.
Purpose of the Study:
- To develop a simple, safe, and efficient method for generating BrCl solutions.
- To produce a BrCl reagent suitable for trace mercury analysis meeting regulatory standards.
Main Methods:
- A straightforward procedure involving the addition of dibromodimethylhydantoin (DBDMH) to aqueous hydrochloric acid (HCl).
- The reaction is completed within approximately 20 minutes.
- Avoidance of pre-cleaning steps, overheating, and excessive vapor evolution.
Main Results:
- A stable BrCl solution was successfully generated.
- The prepared BrCl solution exhibited low mercury content.
- The reagent's quality was confirmed to meet US EPA 1631e/2002 requirements.
Conclusions:
- The developed method offers a convenient and safe alternative for BrCl solution preparation.
- This new method yields a high-quality BrCl reagent ideal for sensitive mercury determination.
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