文章信息/Info

Title:

Evaluation of Uncertainty in Determination of Copper in Beryllium by Atomic Absorption Spectroscopy

文章編號:

1674-3962(2021)07-0548-05

作者:

王佳麗; 白英麗; 孫洪濤

（西北稀有金屬材料研究院寧夏有限公司 稀有金屬特種材料國家重點實驗室，寧夏 石嘴山市 753000）

Author(s):

WANG Jiali;  BAI Yingli;  SUN Hongtao

(State Key Laboratory of Special Rare Metal Materials, Northwest Rare Metal Materials Research Institute Ningxia Co., Ltd., Shizuishan 753000, China)

關鍵詞:

原子吸收光譜法; 鈹; 銅; 測量不確定度

Keywords:

atomic absorption spectroscopy;  beryllium;  copper;  measurement uncertainty

分類號:

TG146.24;O657.31

DOI:

10.7502/j.issn.1674-3962.202004001

文獻標志碼:

A

摘要:

采用原子吸收光譜法對鈹中銅元素含量進行測定，分析了影響測量不確定度的主要因素，通過建立測量過程中各分量不確定度評價的數學模型，對試料稱量、溶解、萃取、標準溶液配制、工作曲線擬合、樣品重復性測量等影響不確定度的分量進行分析，最終合成得到了測量結果的擴展不確定度。結果表明，樣品重復性測量、工作曲線擬合是影響原子吸收光譜法不確定度的主要因素，從而為采用原子吸收光譜法測定鈹中銅含量的檢測質量控制提供理論基礎。

Abstract:

The content of copper element in beryllium is measured by atomic absorption spectroscopy, the main sources that affect the uncertainty of measurement are analyzed, by establishing a mathematical model of each component in the measurement process. Uncertainty components including the sample weighing, dissolution, extraction, preparation of standard solution, work curve fitting and sample repeat determination are analyzed, the expanded uncertainty is got. The results show that the sample repeat determination and work curve are the main factors affecting the uncertainty of the method, which provides a theoretical basis for the determination quality control of copper content in beryllium by atomic absorption spectroscopy method.