论文部分内容阅读
本文描述了同位素稀释（ID）在未来的化学溯源组织机构和化学测量（国际单位制中量的计量）的可比性中将起的潜在作用，其要点是：ID即同位素稀释质谱（按国际单位制），可以直接测量物质量，给出不受基体影响的微量组成，并把一个复杂的化学测量转化成为一个简单的物理测量。为了实现物质量的高准确度测量，需要借助超高准确同位素测量技术，需要不断改善阿伏伽德罗常数的测量，而两者都要借助小的而又完全已知不确定度的同位素丰度比的测量来实现，即称作“绝对”测量，此外为了实现物质质量的测量，在同位素稀释过程中，同位素丰度比的测量，实质上就是样品里粒子数目比的测量，为了更接近摩尔真值，需要建造一种对阿伏伽德罗测量过程的物质量测量的直接溯源机制。
This paper describes the potential role that isotope dilution (ID) will play in future comparability of chemical-sourced tissue and chemical measurements (measurements in the International System of Units). The key points are: ID isotope dilution mass spectrometry (by International Units ), It is possible to measure the mass directly, to give a trace-free composition and to convert a complex chemical measurement into a simple physical measurement. In order to achieve high-accuracy measurement of mass, ultra-accurate and accurate isotope measurement techniques are needed and continuous improvement in the measurement of Avogadro’s number is required, both of which are based on small but well-known isotope abundances of known uncertainty In addition, in order to achieve the measurement of material quality, the isotope abundance ratio measurement in the process of isotope dilution is essentially the measurement of the number-of-particles ratio in the sample. In order to be closer to Moore’s truth, a direct traceability mechanism for the measurement of the Avogadro’s measurement process needs to be built.