光度法快速测定稀土硅镁铁合金中硅、镁、稀土总量  

Rapid Determination of Silicon,Magnesium and Total Content of Rare Earth in Rare Earth-Silicon-Magnesium Ferroalloy by Photometry

作　　者：王金洪[1] 马芳[1] 苏文星 梁彦平 

机构地区：[1]莱芜钢铁集团有限公司,山东莱芜271104 [2]山西海鑫钢铁有限公司,山西运城043801

出　　处：《山东冶金》2007年第5期50-51,共2页Shandong Metallurgy

摘　　要：试样以硝酸、氢氟酸溶解,用硼酸配位络合氟离子,稀释定容后,以钼蓝光度法测定硅,偶氮氯瞵Ⅲ光度法测定稀土总量,偶氮氯瞵Ⅰ光度法测定镁,硅、稀土总量、镁的相对标准偏差分别小于0.035 3%、0.240 8%、0.319 7%。方法操作简便、快速、结果准确,适用于炼钢生产的快速分析。Samples were dissolved by nitric acid and hydrofluoric and boric acid coordinate complex fluorin ion. After being diluted and constant-volumed, molybdenum-blue photometric method is used to determine silicon, chlorophosphonazo Ⅰ photometric method to determine magnesium and chlorophosphonazo Ⅲ photometric method to determine total content of rare earth. The relative standard deviation of the silicon, total content of rare earth and magnesium are smaller than 0.035 3%, 0.240 8% and 0.319 7%. This method easy to operate and rapid in showing accurate result, is suitable for the steel-making production rapid analysis.

关 键 词：稀土硅镁铁合金 光度法 相对标准偏差 

分 类 号：O657.3[理学—分析化学]