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微量钛的分析目前主要采用比色法,但灵敏度、选择性较差。近年来随着极谱催化波的研究和应用,出现了一些钛的催化波体系。我们根据文献的经验,在示波极谱仪上对钛在EDTA—KBrO_3体系中的极谱行为进行了观察和试验,拟定了钢铁中微量钛的阳极化导数示波极谱测定方法。通过试样考核,分析误差符合要求,适用于含钛量低于0.1％的低合金钢、合金铸铁、钒钛稀土球墨铸铁等试样的分析。 一、试剂与仪器 溴酚兰:0.1％(溶于20％的乙醇溶液中) 钛标准溶液:称取0.1000克金属钛(99.9％)于200毫升烧杯中,加50毫升盐酸温热溶解后转入1000毫升容量瓶中,用10％盐酸稀释至刻度,混匀。此溶液每毫升含0.1毫克钛。分取20毫升于1000毫升容量瓶中,用1％
At present, the analysis of trace titanium mainly adopts colorimetric method, but its sensitivity and selectivity are poor. In recent years, with the polarographic catalytic wave research and application, there have been some titanium catalytic wave system. According to the literature experience, we observed and tested the polarographic behavior of titanium in EDTA-KBrO_3 system by oscillopolarography, and developed anodic derivative oscillopolarographic determination of trace titanium in steel. Through the sample examination, the analysis of error to meet the requirements for less than 0.1% titanium content of low alloy steel, alloy cast iron, vanadium titanium rare earth ductile iron and other samples analysis. First, reagents and equipment Bromophenol blue: 0.1% (dissolved in 20% ethanol solution) Titanium standard solution: Weigh 0.1000 grams of titanium metal (99.9%) in 200 ml beaker, add 50 ml of hydrochloric acid dissolved in warm Into 1000 ml volumetric flask, dilute to the mark with 10% hydrochloric acid, mix well. This solution contains 0.1 mg of titanium per ml. Dispense 20 ml in 1000 ml volumetric flask with 1%