论文部分内容阅读
高强度铸铁即球墨铸铁,在机械工业上用途很广。其中镁是决定铸铁性质的重要元素。化学分析测定铸铁中镁,迄今尚无较快的成熟方法。曾用光谱粉末法对铸铁中镁进行测定,但手续繁琐、生产流程长,再现性及准确度均不够理想。为此,我们制定了溶液光谱法测定铸铁中0.02～0.32%的镁,效果良好,完全满足了生产要求,工效提高3～4倍。标准制备:称取0.1658克光谱纯氧化镁(或保证试剂)于250毫升烧杯中,加10毫
High-strength cast iron is ductile iron, a wide range of uses in the machinery industry. Among them, magnesium is an important element that determines the nature of cast iron. Chemical analysis of magnesium in cast iron, so far there is no quick mature method. Spectroscopy powder method used to determine the magnesium in cast iron, but the tedious procedures, long production processes, reproducibility and accuracy are not ideal. To this end, we developed a solution spectrophotometric determination of 0.02 ~ 0.32% of magnesium in cast iron, the effect is good, fully meet the production requirements, work efficiency increased by 3 to 4 times. Standard Preparation: Weigh 0.1658 grams of spectroscopically pure magnesium oxide (or guaranteed reagent) in a 250 ml beaker, add 10 milliliters