Details:

Journal Title:
Journal of Environmental Quality
Personal Author:
Kneer, Marissa L. ; Lazarcik, James ; Ginder‐Vogel, Matthew
Kneer, Marissa L. ; Lazarcik, James ; Ginder‐Vogel, Matthew Less -
NOAA Program & Office:
OAR (Oceanic and Atmospheric Research)
Description:
Sulfur‐containing functional groups in dissolved organic matter (DOM) interact with trace metals, which in turn affects trace metal mobility and bioavailability in aquatic environments. Typical methods for identification and quantification of sulfur in DOM are costly, complex, and time intensive. Triple quadrupole inductively coupled plasma tandem mass spectrometry (ICP‐MS/MS) is capable of part per billion–level sulfur quantification in environmental samples and is a more accessible analytical technique compared with other available methods. This study is the first published investigation of ICP‐MS/MS for the direct quantification of sulfur in freshwater DOM. Sulfur (32S) detection occurs at a mass‐to‐charge ratio of 48 as 32S16O+ after removal of interferences and reaction with oxygen gas. We compare three commonly used DOM preparation methods to assess variability among replicate samples. Preparation of freshwater DOM samples by solid phase extraction followed by evaporation overnight and dissolution in 2% nitric acid results in the most accurate quantification of sulfur. Analysis of sulfur in Suwannee River Fulvic Acid standard serves as method validation, measuring a carbon‐normalized sulfur concentration that is ∼20% higher than previously reported methods. We apply the ICP‐MS/MS analysis method to determine sulfur concentrations in DOM from nine lakes in the northern Midwest. Carbon‐normalized sulfur concentrations in the selected lakes are in general agreement with previously reported percentages of sulfur‐containing formulas in DOM found by Fourier transform–ion cyclotron resonance–mass spectroscopy.
Keywords:
[+]
Environmental Engineering Management, Monitoring, Policy And Law Pollution Waste Management And Disposal Water Science And Technology
Source:
Journal of Environmental Quality, 50(6), 1476-1485
DOI:
https://doi.org/10.1002/jeq2.20291
ISSN:
0047-2425;1537-2537;
Format:
PDF
Publisher:
Wiley
Document Type:
Journal Article
Funding:
Grant no. NA14OAR4170092
Rights Information:
Other
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:7042c4d919043ead57b80951752ef793f4ad13ed8c9af45cd6b53cc38608f651
Download URL:
https://repository.library.noaa.gov/view/noaa/59715/noaa_59715_DS1.pdf
File Type:

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