Continuous ice core melter system with discrete sampling for major ion, trace element, and stable isotope analyses

被引:119
作者
Osterberg, EC
Handley, MJ
Sneed, SB
Mayewski, PA
Kreutz, KJ
机构
[1] Univ Maine, Climate Change Inst, Sawyer Environm Res Ctr, Orono, ME 04469 USA
[2] Univ Maine, Dept Earth Sci, Orono, ME 04469 USA
关键词
D O I
10.1021/es052536w
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We present a novel ice/firn core melter system that uses fraction collectors to collect discrete, high-resolution (< 1 cm/sample possible), continuous, coregistered meltwater samples for analysis of eight major ions by ion chromatography (IC), > 32 trace elements by inductively coupled plasma sector field mass spectrometry (ICP-SMS), and stable oxygen and hydrogen isotopes by isotope ratio mass spectrometry (IRMS). The new continuous melting with discrete sampling (CMDS) system preserves an archive of each sample, reduces the problem of incomplete particle dissolution in ICP-SMS samples, and provides more precise trace element data than previous ice melter models by using longer ICP-SMS scan times and washing the instrument between samples. CMDS detection limits are similar to or lower than those published for ice melter systems coupled directly to analytical instruments and are suitable for analyses of polar and mid-low-latitude ice cores. Analysis of total calcium and sulfur by ICP-SMS and calcium ion, sulfate, and methanesulfonate by IC from the Mt. Logan Prospector-Russell Col ice core confirms data accuracy and coregistration of the split fractions from each sample. The reproducibility of all data acquired by the CMDS system is confirmed by replicate analyses of parallel sections of the GISP2 D ice core.
引用
收藏
页码:3355 / 3361
页数:7
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