HR: 1340h
AN: PP33C-1584    [Abstracts]
TI: Ion chromatography as a measurement device in continuous flow analysis of ice cores
AU: * Budner, D M
EM: drew.budner@sdstate.edu
AF: South Dakato State University, Department of Chemistry and Biochemistry SH219 Box 2202, Brookings, SD 57007 United States
AU: Cole-Dai, J
EM: jihong.cole-dai@sdstate.edu
AF: South Dakato State University, Department of Chemistry and Biochemistry SH219 Box 2202, Brookings, SD 57007 United States
AU: Ferris, D
EM: david.ferris@sdstate.edu
AF: South Dakato State University, Department of Chemistry and Biochemistry SH219 Box 2202, Brookings, SD 57007 United States
AB: Melter-based continuous chemical analysis of ice cores has been increasingly employed in ice core research for fast, high resolution measurements of the chemical impurities in snow and ice. In continuous flow analysis (CFA), a heated melter generates uncontaminated flowing streams of ice core meltwater which are channeled directly into measurement devices, such as spectrophotometers, mass spectrometers and flow injection analyzers. These devices essentially serve as on-line and quantitative detectors for the melter-generated flow streams. Ion chromatography (IC) has been the preferred analytical technique for the determination of major chemical impurities in ice cores. Using IC as the measurement or detection technique for continuous flow melter analysis would provide an analytical system for measurement of all major chemical impurities in ice cores. We have constructed such a system by interfacing an ice core melter with several ion chromatographs. This technique (CFA-IC) takes advantage of the fast sample preparation and sub-sampling speed provided by a melter and the all-ion capability with low detection limits of ion chromatography. Initial testing and ice core analysis demonstrate that the CFA-IC technique is capable of (1) measuring all major ions, (2) high analysis speed as a result of reduced sample preparation time, and (3) high temporal resolution while requiring less ice than the conventional discrete sampling method.
DE: 1827 Glaciology (0736, 0776, 1863)
DE: 1863 Snow and ice (0736, 0738, 0776, 1827)
DE: 1895 Instruments and techniques: monitoring
DE: 4932 Ice cores (0724)
DE: 9310 Antarctica (4207)
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005