The stable isotopic research is established by studying the discrepancy in isotope ratio, which was caused by isotope fractionation, and the isotopic ratio difference can be determined by mass spectrometer.

• 稳定同位素的研究主要是建立在此同位素分化作用所造成的同位素比值差异，而此同位素比值差异可被质谱仪测知。