质谱百科全书之同位素质谱

仪器资料 · 发表于 2017-9-12 06:14:57

质谱百科全书之同位素质谱

The term ‘stable isotope ratio’ in its normal context is
restricted to a small group of elements (i.e., hydrogen,
carbon, nitrogen, oxygen, and sulfur) that are readily
converted into simple gaseous compounds for the
purpose of isotope ratio determination using a mass
spectrometer. This article will focus on the instrumentation
used to measure stable isotope ratios, from
dual inlet systems operating with dynamic gas flow
through later developments for interfacing to gas
chromatography and on to newer static vacuum
designs. The fields of application of stable isotope
ratio mass spectrometry are broad, transcending the
life sciences, atmospheric chemistry, oceanography,
agriculture, archaeology, cosmochemistry, geological
sciences, etc. In these examples, stable isotopes are
used, among other things, to elucidate metabolism,
the sources of materials, to constrain the extent of
chemical reactions, monitor diffusion, assess formation
temperatures, and so on.