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研制标准物质、标准样品的定值方法
浏览次数:249发布日期:2019-11-28

【LAIYUAN/ZUOZHE】BEINACHUANGLIAN 

标准样品

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标准物质标准样品的定值方法分为基准测量方法、参考方法和国内外公认的有效方法3种。基准测量方法是具有樶高计量学特性的方法,其操作可以被完整地描述和理解,可以用SI单位对不确定度进行完整表述,测量结果不依赖被测量的测量标准。

基准方法有:同位素稀释质谱法库仑法、重量法、滴定法、凝固点下降测定法。参考方法是经过系统地研究,确切而清晰地描述了准确测量特定化学成分量所必需的条件和过程的方法,其准确度和精密度能满足评价其他方法准确度和给一级标准物质赋值的要求。国内外公认的有效方法是已被证明技术性能可以满足其应用目的的方法。

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