论文部分内容阅读
我厂为提高机床导轨的耐磨性,对钒钛合金耐磨铸铁进行试验,钒和钛的含量均在0.1～0.3%。一般采用的过氧化氢比色测定钒和钛的方法,由于钒、钛互相干扰,因此不能应用。二苯胺比色法虽然灵敏度较高,但不易掌握。钒盐与磷酸、钨酸钠生成磷钨钒杂多酸,溶液呈黄色,可用异丁醇萃取。根据文献介绍在目视比色的基础上,我们进行了条件试验和补充,钛不干扰钒的测定。并使用一份试样溶液用变色酸钠比色法进行钛的测定。
I plant to improve the wear resistance of machine tool rails, vanadium-titanium alloy wear-resistant cast iron test, vanadium and titanium content of 0.1 to 0.3%. The commonly used method for the determination of vanadium and titanium by hydrogen peroxide colorimetric can not be applied due to the mutual interference of vanadium and titanium. Diphenylamine colorimetry, although higher sensitivity, but not easy to grasp. Vanadium salt and phosphoric acid, sodium tungstate generated phosphovanadomolytic heteropoly acid, the solution was yellow, available isobutanol extraction. According to the literature on visual colorimetric basis, we conducted a conditional test and supplement, titanium does not interfere with the determination of vanadium. A sample solution was used for the determination of titanium using sodium bicarbonate colorimetric method.