کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1240600 969130 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Signal correlation in isotope ratio measurements with mass spectrometry: Effects on uncertainty propagation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Signal correlation in isotope ratio measurements with mass spectrometry: Effects on uncertainty propagation
چکیده انگلیسی

Here the authors argue that the traditional approaches to uncertainty propagation of isotope ratios in mass spectrometry neglect the statistical dependence (correlation) of isotopic signals. It is shown that, in general, mass spectrometric signals of isotopes are correlated. Hence, the uncertainty of isotope ratios can be accurately propagated from their intensities only if signal correlation (covariance) is considered. The discrepancy between the conventionally propagated (with no correlation included) and observed isotope ratio uncertainties is demonstrated using MC–ICP–MS, ICP–TOF–MS and ICP–Q–MS data. This manuscript describes the uncertainty propagation of isotope abundance ratios and ratios of isotope measurements.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part B: Atomic Spectroscopy - Volume 62, Issue 11, November 2007, Pages 1278–1284
نویسندگان
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