کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1243052 1495795 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
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
ترجمه فارسی عنوان
تعیین ایزوتوپهای سرب در یک هسته ی خالص یخبندان جدید گرینلند در زیر پیکوپگ در هر گرم توسط اسپکترومتری جرمی یونیزاسیون حرارتی با استفاده از یک روش ضدعفونی کننده بهبود یافته
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• We report a method for ultra-low Pb isotope determination in polar ice using TIMS.
• Decontamination procedure was improved for a new Greenland deep ice core.
• The use of a PL-7 silica-gel activator enabled sufficient Pb ion beam intensity.
• The procedural blanks were negligible to obtain reliable data from Greenland ice.
• Reliable Pb isotope analysis was achieved for a few tens of picograms of Pb.

An improved decontamination method and ultraclean analytical procedures have been developed to minimize 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 10 g 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.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 140, 1 August 2015, Pages 20–28
نویسندگان
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