Division of Earth & Environmental Sciences, Korea Basic Science Institute, 113 Gwahangno, Yusung-gu, Daejeon 305-333, Korea.
Rapid Commun Mass Spectrom. 2010 Jan;24(1):155-9. doi: 10.1002/rcm.4366.
We have examined the carbon, nitrogen and oxygen isotopic compositions of American, Mexican, Australian, New Zealand and Korean beefs, which are currently being circulated in Korean markets, to check whether stable isotope ratios can identify their country of origin. Each beef exhibited statistically distinct isotopic compositions, especially in oxygen and carbon, because of the different isotopic compositions of their water and cattle feeds. Nevertheless, their isotopic compositions still showed some overlap, especially among USA, Australian, and Korean beefs, which sometimes resulted in significant misidentification when a single isotope was considered. However, the discrimination was generally successful when both the carbon and the oxygen isotopes were used.
我们研究了目前在韩国市场上流通的美国、墨西哥、澳大利亚、新西兰和韩国牛肉的碳、氮和氧同位素组成，以检查稳定同位素比值是否可以识别其原产国。由于水和牛饲料的不同同位素组成，每种牛肉都表现出具有统计学意义的不同同位素组成，特别是在氧和碳方面。然而，它们的同位素组成仍然存在一些重叠，尤其是在美国、澳大利亚和韩国牛肉之间，这有时会导致在仅考虑单一同位素时出现重大误识别。但是，当同时使用碳和氧同位素时，通常可以成功区分。
