低中碳铬铁中硅元素的快速分析  

作　　者：魏恩双[1] 马玉香[1] 包红霞[1] 

机构地区：[1]品质保证部

出　　处：《莱钢科技》2006年第1期40-41,共2页Laigang Science & Technology

摘　　要：本法将经典的高氯酸脱水重量法分析硅改为钼蓝光度法快速测定硅含量。试样用稀硫酸（1＋17）及少量盐酸溶解后，在微酸性溶液中，正硅酸与钼酸铵作用生成黄色的硅钼酸络离子，然后用硫酸亚铁铵将生成的黄色硅钼酸络离子还原成硅钼蓝，其蓝色的强度与硅含量成一定比例关系，借此可用光度法测定硅的含量。In this method, the classic perchloric dehydration gravimetry is changed into molybdenum blue photometry to quickly determine silicon content. After the samples are dissolved by dilute sulphuric acid and a small amount of hydrochloric acid, in slight acidic solution, orthosilicic acid and ammonium molybdate take reaction to form into yellow silicomolybdic complex ion, then to use ammonia ferrous sulfate to reduce the formed yellow ilicomolybdic complex ion into silcomolybdic blue, of which the strength of the blue is certainly proportional to silicon content, consequently silicon content can be determined by photometry.

关 键 词：低碳铬铁 中碳铬铁 稀硫酸 钼蓝光度法 硅 

分 类 号：TQ175.713[化学工程—硅酸盐工业] TG142.15[一般工业技术—材料科学与工程]