Introducing the isotope ratio mass spectrometer and the application of stable isotopes in tracing and controlling the authenticity of food

Most of the time, it is assumed that the abundance ratio of natural isotopes is constant, but when this ratio is measured very precisely, it shows significant changes. It should be noted that the isotope ratio mass spectrometer is able to determine the ratio of stable isotopes very accurately and precisionly, so that by checking the isotope ratio of the elements carbon, hydrogen, oxygen, nitrogen and sulfur using an isotope ratio mass spectrometer, it is possible to fingerprint food made by different manufacturers and as a result to track and control the authenticity of food and especially detect fraud in food products.