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粉末电弧法分析样品中的硼,使硼与氟化锂形成BF_3进入弧焰进行光谱测定。应用于矿石和铸铁件样品的分析,可以避免化学处理,减少沾污,而操作简便,测定下限可达1ppm。采用无硼石墨粉、氟化锂、硫酸锶的混合物为缓冲剂、锗为内标。实验在ДФС-13(2)型平面光栅摄谱仪器上进行,以交流电弧为激发光源。一试验 1 基体和标准系列的配制对矿石样品则采用SiO_2(70%)、MgO(10%)、Al_2O_3(8%)、CaO(8%)、Fe_2O_3(3%)、Na_2CO_3(1%)的混合物为基体,磨均后配制含硼为3000、1000、300、100、30、10、3、1ppm的标准系列。对铸铁件样品时,则采用无硼石墨粉与氧化铁的混合物(其
Powder arc analysis of boron in the sample, the formation of boron and lithium fluoride into BF3 flame spectrometry. Used in the analysis of ore and cast iron samples, to avoid chemical treatment, reduce contamination, and easy to operate, the lower limit of determination of up to 1ppm. Using boron-free graphite powder, lithium fluoride, strontium sulfate mixture as a buffer, germanium as an internal standard. Experiments were carried out on a ДФС-13 (2) plane grating spectrograph with an AC arc as the excitation light source. Test 1 The matrix and standard series of samples were prepared for the ore samples using SiO 2 (70%), MgO (10%), Al 2 O 3 (8%), CaO (8%), Fe 2 O 3 (3%), Na 2 CO 3 The mixture as a matrix, after grinding the preparation of boron containing 3000,1000,300,100,30,10,3,1 ppm standard series. For cast iron samples, a mixture of boron-free graphite powder and iron oxide is used