论文部分内容阅读
冶金标准物质(过去习惯于称“标样”)用于校准分析仪器、评价分析测量方法或确定材料的成分量值方面起着重要的作用。作为成批制备的金属标准物质要求成分含量均匀是十分重要的。按照国际标准化组织标准物质委员会所发布的指南30,对标准物质的均匀性定义为:“对于物质的一种或多种指定特性具有相同结构或组分的一种状态。不论样品是否取自同一包装单元(如:瓶、包等),通过检验具有规定大小的样品,若被测定特性值落在规定的不确定度范围内,则该标准物质就这一指定的特性而言,称为均匀”。在指南35中对均匀性概念作了进一步描述:“理论上讲,如
Metallurgical reference materials (formerly known as ”standards“) play an important role in the calibration of analytical instruments, in the evaluation of analytical methods of measurement, or in the determination of the component values of materials. It is important to have a homogeneous content of the metal standard as a batch preparation. The uniformity of a reference material is defined in accordance with the Guideline 30 issued by the International Standards Organization’s Standard Material Commission: ”A condition that has the same structure or composition for one or more of the specified properties of the material. Whether or not the sample was taken from The same packaging unit (such as: bottles, bags, etc.), by testing a sample of a specified size, if the measured value falls within the specified uncertainty, the standard material for the specified characteristics, referred to as Uniform “. The concept of homogeneity is further described in Guideline 35: ”In theory, eg