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Citation
Tags
HERO ID
5020554
Reference Type
Journal Article
Title
Rapid pre-concentration of mercury in solids and water for isotopic analysis
Author(s)
Janssen, SE; Lepak, RF; Tate, MT; Ogorek, JM; Dewild, JF; Babiarz, CL; Hurley, JP; Krabbenhoft, DP
Year
2019
Is Peer Reviewed?
Yes
Journal
Analytica Chimica Acta
ISSN:
0003-2670
EISSN:
1873-4324
Volume
1054
Page Numbers
95-103
Language
English
PMID
30712597
DOI
10.1016/j.aca.2018.12.026
Web of Science Id
WOS:000457244900009
Abstract
The precise quantification of mercury (Hg) stable isotope compositions in low concentration or dilute samples poses analytical challenges due to Hg mass limitations. Common Hg pre-concentration procedures require extended processing times, making rapid Hg stable isotope measurements challenging. Here we present a modified pre-concentration method that combines commonly used Hg reduction and gold trap amalgamation followed by semi-rapid thermal desorption (less than 1 h) and chemical trapping. This custom designed system was demonstrated to perform adequately on multiple trapping matrices including a new bromine monochloride (BrCl) wet oxidant trap (40% 3HNO3:BrCl), capable of trapping consistently in 2 mL volume over a wide range of Hg masses (5-200 ng). The procedure was also shown to work effectively on natural matrices, waters and sediments, producing comparable isotope results to the direct digestion analyses. Here, we present a method that can effectively triple sample throughput in comparison to traditional procedures, and also access lower concentration matrices without compromising the accuracy or precision of Hg isotope measurements.
Tags
IRIS
•
Inorganic Mercury Salts (2)
Mercurous Chloride
Litsearch 2018-2019
PubMed
•
Methylmercury
Literature Search: Mar 2017 - May 2019
WoS
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