This paper presents The investigation of laser resonance ionization mass spectroscopy of lutetium with our laser ionization mass spectrometry system manufactured by our own. The optimum radius of laser focal spot over...This paper presents The investigation of laser resonance ionization mass spectroscopy of lutetium with our laser ionization mass spectrometry system manufactured by our own. The optimum radius of laser focal spot overlapped with atomic beam is calculated theoretical.Lutetium ionic signal at The rate of 1.8 ×105 s- 1is detected The Sample she of 1 μg lutetium.. With laser resonance ionization and The of atomizer,it is possible that The detection ho reaches 106 atoms. The effect of laser-induce isotopic discrimination on The measurement of isotope ratio is discussed. It is proposed that laser bandwidth and wavelength tuning effects are The main factors of deviation of lutetium isotopic ratios with this broad bandwidth laser.展开更多
The state-of-art of the isotopic analysis technique in the laser resonance ionization mass spectrometry (LRIMS) in northwest institute of nuclear technology was founded. Main technique obstacles and feasible resolvent...The state-of-art of the isotopic analysis technique in the laser resonance ionization mass spectrometry (LRIMS) in northwest institute of nuclear technology was founded. Main technique obstacles and feasible resolvents with the application of 1,RIMS in isotopic analysis were discussed. In order to obtain accurate isotope ratio determined by LRIMS, the new method combined with experimental process and correction factor calculated by numerical computation method was proposed and applied to measure lutetium isotope ratio. The natural lutetium isotope ratio determined by use of this method was less than 0.8% by thermal ionization mass spectrometry (TIMS), This method can also be applied to determine abundance ratios of some other elements.展开更多
The progress of science is in part attributed to the development of new methodologies. The application of mass spectrometry (MS) and nuclear magnetic resonance (NMR) in the study of biological macromolecules is such a...The progress of science is in part attributed to the development of new methodologies. The application of mass spectrometry (MS) and nuclear magnetic resonance (NMR) in the study of biological macromolecules is such a representative example, which is the subject of this year’s Nobel prize award in chemistry shared by three scientists. The works include the development of soft desorption ionization methods for mass spectrometric analysis of biological macromolecules and the development of NMR for determining the three-dimensional structure of biological macromolecules in solution. These developments revolutionized the analytical methods for biomolecules such as proteins and facilitate the study of biological macromolecules so much enough to have deep effects on the whole life sciences.展开更多
共振电离质谱学(简称RIMS-Resonance Ionization Mass Spectroscopy)是八十年代发展起来的一种新的光谱与质谱相结合的技术。它基于原子与光子相互作用时产生的共振激发和电离效应。利用激光技术,用一个或几个波长可调谐的激光,将某种...共振电离质谱学(简称RIMS-Resonance Ionization Mass Spectroscopy)是八十年代发展起来的一种新的光谱与质谱相结合的技术。它基于原子与光子相互作用时产生的共振激发和电离效应。利用激光技术,用一个或几个波长可调谐的激光,将某种待测原子一步或多步选择性地共振激发到某个激发态,再用激光(或电场)将其电离,然后通过质谱仪进一步进行质量分析。RIMS方法具有四个显著特点:1.高灵敏度,2.高选择性,3.高时空分辨率,4.广泛的适用性。展开更多
文摘This paper presents The investigation of laser resonance ionization mass spectroscopy of lutetium with our laser ionization mass spectrometry system manufactured by our own. The optimum radius of laser focal spot overlapped with atomic beam is calculated theoretical.Lutetium ionic signal at The rate of 1.8 ×105 s- 1is detected The Sample she of 1 μg lutetium.. With laser resonance ionization and The of atomizer,it is possible that The detection ho reaches 106 atoms. The effect of laser-induce isotopic discrimination on The measurement of isotope ratio is discussed. It is proposed that laser bandwidth and wavelength tuning effects are The main factors of deviation of lutetium isotopic ratios with this broad bandwidth laser.
文摘The state-of-art of the isotopic analysis technique in the laser resonance ionization mass spectrometry (LRIMS) in northwest institute of nuclear technology was founded. Main technique obstacles and feasible resolvents with the application of 1,RIMS in isotopic analysis were discussed. In order to obtain accurate isotope ratio determined by LRIMS, the new method combined with experimental process and correction factor calculated by numerical computation method was proposed and applied to measure lutetium isotope ratio. The natural lutetium isotope ratio determined by use of this method was less than 0.8% by thermal ionization mass spectrometry (TIMS), This method can also be applied to determine abundance ratios of some other elements.
文摘The progress of science is in part attributed to the development of new methodologies. The application of mass spectrometry (MS) and nuclear magnetic resonance (NMR) in the study of biological macromolecules is such a representative example, which is the subject of this year’s Nobel prize award in chemistry shared by three scientists. The works include the development of soft desorption ionization methods for mass spectrometric analysis of biological macromolecules and the development of NMR for determining the three-dimensional structure of biological macromolecules in solution. These developments revolutionized the analytical methods for biomolecules such as proteins and facilitate the study of biological macromolecules so much enough to have deep effects on the whole life sciences.
文摘共振电离质谱学(简称RIMS-Resonance Ionization Mass Spectroscopy)是八十年代发展起来的一种新的光谱与质谱相结合的技术。它基于原子与光子相互作用时产生的共振激发和电离效应。利用激光技术,用一个或几个波长可调谐的激光,将某种待测原子一步或多步选择性地共振激发到某个激发态,再用激光(或电场)将其电离,然后通过质谱仪进一步进行质量分析。RIMS方法具有四个显著特点:1.高灵敏度,2.高选择性,3.高时空分辨率,4.广泛的适用性。
