摘要
本文选择了最佳测量条件,找出了一个寻找背景的简便方法,着重研究了关于在铁吸收限长波边微量元素的基体校正问题。
Determination of 25 elements in the geochemical samples have been performed. Major and trace elements are determined directly with ground powder samples. A Rigaku 3070E model XRF spectrometer with seven fixed monochromators is used. Determination of all elements are performed using a Rh target X-ray tube. As many as 36 geochemical reference samples are used as calibration standards. Background position of each peak can be found unisg artificial mixture containing 30 elements. The valleys on scanning chart are selected as position of background. In order to reduce the analytical duration, the same background position is used for several peaks. Major element determinations show accuracy in the range 0.1—3％ and precision in 0.1—1.5％. Accuracy for trace elements is generally in the range 2-46 ppm and precision generally in 0.5-10％ with the exception of La (13％).
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第7期652-655,共4页
Chinese Journal of Analytical Chemistry
关键词
化探样品
荥光光谱法
X射线
元素
Geochemical materials
X-ray fluorescence spectrometry
