摘要
采用Li_2B_4O_7为熔剂,LiBr为脱膜剂,同时加入大量氧化剂LiNO_3防止钨和钼挥发损失及保护铂金合金坩埚不受腐蚀,制备了X射线荧光熔融样片。通过各种基体校正方式及校准曲线分段处理,建立了X射线荧光同时测定矿物中从微量到主量较大含量范围三氧化钨和钼的方法。该法的测定结果与化学法和ICP法相符。两个样品分别10次制样测量,相对标准偏差(RSD):WO_3从0.19%到2.84%,Mo从0.15%到3.22%。
A fusion bead for the determination of tungsten trioxide and molybdenum in minerals by X-ray fluorescence spectrometry were prepared,with using Li2B4O7 as flux and LiBr as mould release agent,and adding larger quantities of LiNOs as oxidant to prevent tungsten and molybdenum from volatilizing and Pt-Au crucible from being corroded. Through adoption of differ, ent matrix correction mode and subsection processing of standard calibration curve, simultaneous determination of micro and macro tungsten trioxide and molybdenum in minerals had been achieved by X-ray fluorescence spectrometry. Results of this method were consistent with those of chemical and ICP-AES methods. Two samples were chosen for precision experiment. Relative standard deviation（RSD）for ten determination of tungsten trioxide and molybdenum ranged from 0.19% to 2.84% and 0.15% to 3.22% ,respectively.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2007年第5期25-29,共5页
Metallurgical Analysis
关键词
X射线荧光
三氧化钨
钼
基体校正
校准曲线分段
X-ray fluorescence
tungsten trioxide
molybdenum
matrix correction
calibration curve subsection
