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本工作所分析的锌样为高纯锌,其中Cu,Pb,Cd,Fe的含量仅为百万分之几。为此,要求测定方法的灵敏高。Cd的灵敏线(2288.02A)在短波,无合适锌线做内标。目前高纯锌的分析方法较少。本工作采用中型光谱仪,石墨电极小孔粉末法,以铋(Bi)做内标,直流电弧阳极激发。待测元素含量范围:Cu 0.000125～0.004％;Pb,Cd 0.00025～0.008％;Fe 0.0006～0.008％。实验部分 1.仪器:ИСП-28中型光谱仪,三透镜照明系统,中间光栏5毫米,狭缝宽12微米。光源:直流电弧。8安培,曝光70秒。电极:光谱纯石墨电极,直径6毫米,下电极孔径ф4×
The zinc samples analyzed in this work are high purity zinc, in which the contents of Cu, Pb, Cd and Fe are only a few parts per million. For this reason, the determination method requires high sensitivity. The sensitive line of Cd (2288.02A) is the internal standard for short-wave, unsuitable zinc wire. At present, high purity zinc analysis method is less. This work using medium spectrometer, graphite electrode pore powder method to bismuth (Bi) as an internal standard, DC arc anode excitation. Element content range to be tested: Cu 0.000125 ~ 0.004%; Pb, Cd 0.00025 ~ 0.008%; Fe 0.0006 ~ 0.008%. Experimental part 1. Instruments: ИСП-28 medium spectrometer, three lens lighting system, the middle light bar 5 mm, slit width 12 microns. Light source: DC arc. 8 Amps, exposure 70 seconds. Electrode: Spectrally pure graphite electrode, 6 mm in diameter, the lower electrode aperture ф4 ×