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http://dx.doi.org/10.1021/es3022864

has been cited by the following article:

• TITLE: Trace-Level Analysis of Hexavalent Chromium in Lake Sediment Samples Using Ion Chromatography Tandem Mass Spectrometry

  AUTHORS: 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

  KEYWORDS: Trace-Level Analysis, Ion Chromatography, Tandem Mass Spectrometry, Chromium Speciation, Speciated Isotope Dilution

  JOURNAL NAME: Journal of Environmental Protection, Vol.7 No.3, February 29, 2016

  ABSTRACT: 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.