基于生成氟硼酸钾的电感耦合等离子体原子发射光谱法测定多晶硅中硼

为了快速简便地运用电感耦合等离子体原子发射光谱法（ICP-AES）检测微量硼的含量，减少硼在消解过程中的损失，通过采用氢氟酸-硝酸消解样品，加入KF使硼生成的HBF₄转化为一种非常稳定的化合物KBF₄，再用ICP-AES测定试液中硼。探讨了氟化钾用量、挥发时间和温度等因素对测定的影响，并优化了实验参数。用本法测定多晶硅中的硼，其检出限为2.6 pg/mL，样品测定结果的相对标准偏差在3.6%~6.9%之间，加标回收率为98%~102%。

Inductively coupled plasma atomic emission spectrometric determination of boron in polycrystalline silicon based on the formation of potassium fluoborate

In order to rapidly and simply determine the content of trace boron in polycrystalline silicon by inductively coupled plasma atomic emission spectrometry(ICP-AES) and reduce the volatilization loss of boron during digestion procedure,a novel method was proposed in this study.The sample was decomposed with hydrofluoric acid and hydrogen nitrate.Then,KF was added to make HBF4 formed from boron changing to a very stable compound KBF4.Finally,the content of boron in testing solution was determined by ICP-AES.The effect of KF dosage,evaporation time and temperature on the determination was discussed.The experimental parameters were optimized.The proposed method was applied to the determination of boron in polycrystalline silicon.The detection limit was 2.6 pg/mL,the relative standard deviation(RSD) was 3.6 %-6.9 %,and the recoveries were 98 %-102 %.