摘要
The analysis of hexavalent chromium, Cr(VI), in soil and sediment samples has been predominantly carried out in materials containing elevated levels. Reliable analysis of trace-level of Cr(VI) in sediment samples remains challenging. Cr(VI) analyses with multipoint calibration and speciated isotope dilution (SID) adapted from U.S. EPA method 6800 were used to measure lower-level Cr(VI) on an ion chromatograph coupled with a tandem mass spectrometer (IC-MS/MS). Lake sediment samples were collected from various locations in Northern Ontario and Cr(VI) was extracted using both alkaline digestion and ethylene diaminetetraacetic acid (EDTA) extraction. Certified reference materials were extracted and analyzed by IC-MS/MS and UV-VIS detection. The SID-MS approach allowed for the quantification of Cr(VI) in samples with concentration levels below 0.5 μg.g-1 wet weight.
The analysis of hexavalent chromium, Cr(VI), in soil and sediment samples has been predominantly carried out in materials containing elevated levels. Reliable analysis of trace-level of Cr(VI) in sediment samples remains challenging. Cr(VI) analyses with multipoint calibration and speciated isotope dilution (SID) adapted from U.S. EPA method 6800 were used to measure lower-level Cr(VI) on an ion chromatograph coupled with a tandem mass spectrometer (IC-MS/MS). Lake sediment samples were collected from various locations in Northern Ontario and Cr(VI) was extracted using both alkaline digestion and ethylene diaminetetraacetic acid (EDTA) extraction. Certified reference materials were extracted and analyzed by IC-MS/MS and UV-VIS detection. The SID-MS approach allowed for the quantification of Cr(VI) in samples with concentration levels below 0.5 μg.g-1 wet weight.
作者
Stefanie Mädler
Fengrong Sun
Cindy Tat
Nadya Sudakova
Peter Drouin
Robert J. Tooley
Eric J. Reiner
Teresa A. Switzer
Richard Dyer
H. M. Skip Kingston
Matt Pamuku
Vasile I. Furdui
Stefanie Mädler;Fengrong Sun;Cindy Tat;Nadya Sudakova;Peter Drouin;Robert J. Tooley;Eric J. Reiner;Teresa A. Switzer;Richard Dyer;H. M. Skip Kingston;Matt Pamuku;Vasile I. Furdui(Laboratory Services Branch, Ontario Ministry of the Environment and Climate Change, Ontario, Canada;Conservation Ontario, Ontario, Canada;Department of Chemistry, University of Toronto, Ontario, Canada;Ontario Geological Survey, Ontario Ministry of Northern Development and Mines, Ontario, Canada;Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, USA;Applied Isotope Technologies, Pittsburgh, USA)
