标准科学Issue(7)：58-64,7.DOI:10.3969/j.issn.1674-5698.2017.07.012
X射线荧光光谱法测定黄金首饰金含量不确定度的评定
The Uncertainty Evaluation of Gold Content in Gold Jewelry by X-ray Fluorescence Spectrometry
余东阳 1刘文超 2张遐1
作者信息
- 1. 湖北工业大学机械工程学院
- 2. 武汉产品质量监督检验所
- 折叠
摘要
Abstract
The surface element of gold jewelry is excited by X ray to emit the characteristic X ray fluorescence energy spectrum line. There is a linear relationship between the energy spectrum and the content of different elements. The energy dispersive X ray fluorescence spectrometer uses the pulse height analyzer and the related software to separate the pulse of different energy to find the corresponding element and measure the specific content of the corresponding element. This paper calculates the uncertainty of gold content in gold jewelry samples by means of a series of measured values of gold content in gold jewelry by X ray fluorescence spectrometer based on GB/T 18043-2013, establishes the mathematical model by using the least squares method with standard value x and the average value y of three measurements to find the linear equation, and finally calculates the extended uncertainty of gold content in 18 karat gold samples and pure gold samples respectively when the confidence factor is 2 through the use of standard materials.关键词
特征X射线荧光能量光谱线/金含量/测量值/标准物质/扩展不确定度Key words
characteristic X ray fluorescence energy spectrum line/gold content/measured value/reference material/extended uncertainty引用本文复制引用
余东阳,刘文超,张遐..X射线荧光光谱法测定黄金首饰金含量不确定度的评定[J].标准科学,2017,(7):58-64,7.
