کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5407575 1506051 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment of diffusion coefficients of general solvents by PFG-NMR: Investigation of the sources error
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Assessment of diffusion coefficients of general solvents by PFG-NMR: Investigation of the sources error
چکیده انگلیسی
Accurate measurements of the diffusion coefficients, including an estimate of uncertainty, of various solvent molecules using the PFG-NMR method were performed in this study. Accurate diffusion coefficients were obtained using the Shigemi NMR tube. The relative combined standard uncertainties of the diffusion coefficients were found to be within approximately 0.4%. The three uncertainty sources (signal decay of the standard and the solvent, and diffusion coefficient of standard) equally affect the combined standard uncertainties. Unreliable data were obtained using a normal NMR tube, indicating that convection and background gradient effects significantly affected the accurate measurement of the diffusion coefficients.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 180, Issue 2, June 2006, Pages 266-273
نویسندگان
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