摘要
针对EDXRF技术分析矿石中铁元素含量问题,提出了一种新的刻度方法。利用EDXRF分析技术得到了钛、钒、镍、铜、锌对铁元素的吸收增强效应。结果表明,Fe元素Kα系X射线的归一计数率(RFe)与含量(WFe)之间的关系表现为双曲线形式。根据前期研究结果,建立了一种基于最小二乘回归算法的指数拟合工作曲线刻度方法,同时实现了对基体效应的有效校正。通过对3种铁矿石中铁元素含量计算结果表明,与传统的多元回归刻度方法相比,指数刻度方法有较好的计算结果。
A new approach of calibration equation to calculate iron content in ore material was developed in energy dispersive X-ray fluorescence （EDXRF） technique. The absorption and enhancement effect of titanium, vanadium, nickel, copper, zinc on iron were measured respectively by using EDXRF analysis instrument. The results show that the relationship between unitary coefficient （RFe） of Fe Kα X-ray count rate and content （WFe） are with a Hyperbola form. Finally, an exponential fitting method based on least-square regression was established to calibrate the work curve and correct the matrix effect. A relatively good result was obtained in three kind of iron ore material samples compared with traditional polynomial calibration method.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2010年第B09期506-510,共5页
Atomic Energy Science and Technology
关键词
二元系
基体效应
指数刻度
EDXRF
binary element system
matrix effect
exponential calibration
EDXRF
