基准方法及其在标准物质定值中的应用

Primary method and its application of characterization of reference materials

介绍国际物质量委员会(CCQM)认定的同位素稀释质谱法、库仑法、滴定法、凝固点下降法和重量法等5种基准方法的特点,分析了5种基准方法在标准物质定值中的应用情况,并对基准方法的发展进行了展望。

The five primary methods of isotope dilution with mass spectrometry,coulometry,titrimetry,freezing point depression determination and gravimetry(with gas mixtures or gravimetric analysis)determined by consultative committee for amount of substance(CCQM)were introduced.The applications and the characteristics of the primary methods were analyzed.The development of the five primary methods were prospected.