کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1194545 | 1492371 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Isotope ratio measurements of trace Nd by the total evaporation normalization (TEN) method in thermal ionization mass spectrometry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Isotope ratio measurements of trace Nd by the total evaporation normalization (TEN) method in thermal ionization mass spectrometry Isotope ratio measurements of trace Nd by the total evaporation normalization (TEN) method in thermal ionization mass spectrometry](/preview/png/1194545.png)
چکیده انگلیسی
Isotope ratios of very small Nd samples (0.1-5 ng) are measured by the total evaporation normalization (TEN) method. Samples as small as 0.5 ng can be measured with an external precision of 140 ppm by this method. The average 143Nd/144Nd ratio of the samples with the measured electric charge Q (143Nd) = 10-50 Ã 10â11 corresponds roughly to 0.5 ng JNdi-1, is 0.51214 ± 0.00007 (n = 7) and is coherent with the values obtained by conventional dynamic multi-collection thermal ionization mass spectrometric measurements. The precision of 0.5 ng Nd measurements is sufficient for the application of the 143Nd/144Nd ratio as a geochemical tracer. The precision of TEN measurements for samples smaller than 5 ng is superior to that of the conventional method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 264, Issues 2â3, 1 July 2007, Pages 157-163
Journal: International Journal of Mass Spectrometry - Volume 264, Issues 2â3, 1 July 2007, Pages 157-163
نویسندگان
Shigeyuki Wakaki, Shin-Nosuke Shibata, Tsuyoshi Tanaka,