Bestimmung der Empfindlichkeit bei Tc-99-NMR-Messungen an einem 250-MHz-Spektrometer
作者:
M. Findeisen,
B. Lorenz,
M. Wahren,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1990)
卷期:
Volume 26,
issue 11
页码: 520-523
ISSN:0021-1915
年代: 1990
DOI:10.1080/10256019008622419
出版商: Taylor & Francis Group
关键词: accuracy;computers;nuclear magnetic resonance;quantity ratio;technetium compounds;technetium 99;sensitivity;signal-to-noise ratio
数据来源: Taylor
摘要:
By means of different concentrations the signal-to-noise ratios of Tc-99-NMR spectra were determined applying well measurable Tc-samples [tetrabutylammoniwn pertechnetate, TBA (TcO4)J and a 250 MHz-spectrometer. The signal-to-noise ratios of the spectrawere determined by using the integrated routines of the firm's software and accumulating different number of scans. By fittings of data of the signal-to-noise ratio dependence and by extrapolation the minimum Tc-concentralion could be empirically found out. Applying a duration of measurements of 12 hours about 10−7molar concentrations can be determined.
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