The technology of stable C, N isotope ratio is an effective method for geographical origin traceability of beef.
利用稳定性碳、氮同位素技术是用于牛肉产地溯源的有效方法。
Those radioactive elements are N-16 the radioactive isotope (or version) of nitrogen (air).
这些发射性元素包括：氮16（空气中氮元素的放射性同位素）。
The method of determining Ni, Cu and Pbi n urine with isotope dilution mass spectrometry(IDMS)is described.
介绍了采用同位素稀释质谱 法（IDMS）测定 冻干人尿样品中镍、铜、铅的含量。
The method of determining Ni, Cu and Pbi n urine with isotope dilution mass spectrometry(IDMS)is described.
介绍了采用同位素稀释质谱 法（IDMS）测定 冻干人尿样品中镍、铜、铅的含量。
应用推荐