电感耦合等离子体发射光谱法测定蓝晶石中的三氧化二铝  

Determination of aluminum oxide in kyanite by inductively coupled plasma atomic emission spectrometry

作　　者：韩夫强 李扬 张彩霞[1] 席秀丽 

机构地区：[1]河北省地矿局第九地质大队,河北邢台054000

出　　处：《化学分析计量》2018年第1期87-90,共4页Chemical Analysis And Meterage

摘　　要：建立测定蓝晶石中三氧化二铝的电感耦合等离子体发射光谱法。样品采用氢氟酸–硫酸、盐酸–硼酸预处理,然后用氢氧化钠–过氧化钠混合熔剂熔融。以稀氢氧化钠溶液提取,盐酸酸化后用电感耦合等离子体发射光谱仪测定。在优化实验条件下,三氧化二铝的质量浓度在0~10.00μg/mL范围内与发射光强度呈良好的线性,r=0.999 4,检出限为4.63μg/g;测定结果的相对标准偏差为0.11%~0.30%(n=12),标准物质测定结果的相对误差为0.14%~0.26%,加标回收率为97.58%~100.19%。该方法操作简单,解决了蓝晶石矿物难熔问题,可应用于蓝晶石中三氧化二铝的测定。An inductively coupled plasma atomic emission spectrometry method for the determination of aluminumoxide in kyanite was established. The samples were pretreated with hydrofluoric acid–sulfuric acid,hydrochloric acid–boricacid,and then fused with sodium hydroxide–sodium peroxide. The sample was determined by inductively coupled plasmaemission spectrometer after being extracted by dilute sodium hydroxide solution and acidated by hydrochloric acid. Underthe optimization of experimental conditions,the mass concentration of aluminum oxide was linear with intensity of emittedlight in the range of 0–10.0 μg/mL, r=0.999 4, the detection limit was 4.63 μg/g. The relative standard deviation ofdetection results was 0.11%–0.30%（n=12）. The relative error of reference material detection results was 0.14%–0.26%, andrecovery of standard addition was 97.58%–100.19%. This method is simple,and solves the problem of refractory kyanitemineral, so it can be applied to the determination of aluminum oxide in kyanite.

关 键 词：蓝晶石 三氧化二铝 硼酸 电感耦合等离子体发射光谱法 

分 类 号：O657.3[理学—分析化学]