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Determination of lead isotopes in a new Greenland deep ice core at the sub-picogram per gram level by thermal ionization mass spectrometry using an improved decontamination method

Cited 3 time in scopus
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Title
Determination of lead isotopes in a new Greenland deep ice core at the sub-picogram per gram level by thermal ionization mass spectrometry using an improved decontamination method
Other Titles
TIMS를 이용한 그린란드 빙하코어 내 pg/g 이하 수준으로 존재하는 납 안정동위원소 비 분석 연구
Authors
Han, Changhee
Hong, Sung-Min
Hur, Soon Do
Han, Yeongcheol
Kang, Jung-Ho
장채원
Lee, Khanghyun
Laurie J. Burn-Nunes
Keywords
Greenland deep ice core; Improved decontamination procedure; Lead isotopes; Silica-gel activator; TIMS
Issue Date
2015
Citation
Han, Changhee, et al. 2015. "Determination of lead isotopes in a new Greenland deep ice core at the sub-picogram per gram level by thermal ionization mass spectrometry using an improved decontamination method". TALANTA, 140(1): 20-28.
Abstract
An improved decontamination method and ultraclean analytical procedures have been developed to minmize Pb contamination of processed glacial ice cores and to achieve reliable determination of Pb isotopes in North Greenland Eemian Ice Drilling (NEEM) deep ice core sections with concentrations at the sub-picogram per gram level. A PL-7 (Fuso Chemical) silica-gel activator has replaced the previously used colloidal silica activator produced by Merck and has been shown to provide sufficiently enhanced ion beam intensity for Pb isotope analysis for a few tens of picograms of Pb. considering the quantities of Pb contained in the NEEM Greenland ice core and a sample weight of 10g used for the analysis, the blank contribution from the sample treatment was observed to be negligible. The decontamination and analysis of the artificial ice cores and selected NEEM Greenland ice core sections confirmed the cleanliness and effectiveness of the overall analytical process.
URI
http://repository.kopri.re.kr/handle/201206/7375
DOI
http://dx.doi.org/10.1016/j.talanta.2015.03.007
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