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铌铁中铅的含量很低,部标规定Nb_1~#标准中铅含量应低于0.002％,Nb_2~#标准中铅的含量应低于0.005％。利用化学手段测定,处理步骤较长,我们利用原子吸收分析方法对铌铁中的铅进行了测定取得了一定的效果。 一、仪器与试剂 Perkin-Elmer 460原子吸收分光光度计,D_2背景校正; HGA-72石墨炉,056型记录仪,铅空心阴极灯; 硝酸:(G.R),并经石英蒸馏器重蒸馏精制; 氟氢酸:(A.R);
The content of lead in ferroniobium is very low. The lead content in Nb_1 ~ # standard should be less than 0.002% according to the Ministry of Standard, and the content of lead in Nb_2 ~ # should be less than 0.005%. Determination of chemical methods, the processing steps longer, we use atomic absorption analysis of lead in ferroniobium has been determined and achieved some results. Instrument and reagent Perkin-Elmer 460 atomic absorption spectrophotometer, D_2 background correction; HGA-72 graphite furnace, 056 type recorder, lead hollow cathode lamp; Nitric acid: (GR) Hydrogen Acid: (AR);