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用 QF—60中型摄谱仪改装的原子吸收光度计及其在分析上的应用。1.钢中残余铜的分析(0.05～0.40%):取0.5克钢样子100毫升钢铁量瓶中,加20毫升1:1盐酸,加热溶解,如不溶,可加5毫升硝酸,待大部溶后,小心滴加5毫升30%双氧水,全溶后煮沸分解双氧水,冷却,以水稀至刻度,干滤,滤液备用。条件:铜阴极灯,灯流5毫安,燃烧器高度5毫米,空气流量3.8升/分,乙炔流量1.2升/分。2.球铸铁中镁的分析:取0.1克样于100毫升钢铁量瓶中,加溶解酸10毫升(10毫升浓
Atomic Absorption Spectrometer Modified with QF-60 Medium Spectrometer and Its Analytical Application. Analysis of residual copper in steel (0.05 ~ 0.40%): take 0.5g steel sample 100ml steel flask, add 20ml of 1: 1 hydrochloric acid, heat to dissolve, if insoluble, add 5ml of nitric acid until most After dissolving, carefully dropping 5 ml of 30% hydrogen peroxide, boiled decomposition of hydrogen peroxide solution after cooling, cooled to dilute to the mark, dry filtration, the filtrate standby. Conditions: Copper cathode lamp, lamp current 5 mA, burner height 5 mm, air flow 3.8 l / min, acetylene flow 1.2 l / min. 2. Cast iron magnesium in the analysis: Take 0.1 g sample in 100 ml steel flask, add 10 ml dissolved acid (10 ml concentrated