[Molybdenum]:Determination of tungsten and molybdenum in minerals by fusion beads X-ray fluorescence spectrometry

A fusion bead for the determination of tungsten trioxide and molybdenum in minerals by X- ray fluorescence spectrometry were prepared,with using Li_2B_4O_7 as flux and LiBr as mould release a- gent,and adding larger quantities of LiNO_3 as oxidant to prevent tungsten and molybdenum from vol- atilizing and Pt-Au crucible from being corroded.Through adoption of different matrix correction mode and subsection processing of standard calibration curve,simultaneous determination of micro and mac- ro tungsten trioxide and molybdenum in minerals had been achieved by X-ray fluorescence spectrome- try.Results of this method were consistent with those of chemical and ICP-AES methods.Two sam- ples 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......Details,please contact the auther, editor directly.

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%。

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