将样品与微晶纤维素混匀后置于模具中,以32 MPa压力制成外径40 mm、内径32 mm的样片。用X射线荧光光谱法测定矿石中钨和锡的含量。钨、锡的检出限为4.9,3.8 mg·kg-1。方法用于矿石样品分析,钨和锡的测定值相对标准偏差(n=6)分别为1.7%,0.37%。测定值与国家标准方法测定值相一致。

A method of XRFS for the determination of tungsten and tin in ores was proposed in this paper. Sample was blended with avicel and pressed in a mould under a pressure of 32 MPa to form a disc sample with its outside diameter of 40 mm and inside diameter of 32 mm. Values of detection limits found were 4.9 mg·kg-1 for tungsten and 3.8 mg·kg-1 for tin respectively. The proposed method was applied to the analysis of ores, giving values of RSD′s (n=12) 1.7% for tungsten and 0.37% for tin. Results obtained in consistency with the results found by GB methods.