磷钼蓝分光光度法测定钢铁中的磷  

Determination of Phosphorus in Steel by Phosphomolybdenum Blue Spectrophotometry

作　　者：刘芳[1] Liu Fang(School of Chemical Engineering of Weifang Vocational College,Weifang 262737,China)

机构地区：[1]潍坊职业学院化学工程学院,山东潍坊262737

出　　处：《山东化工》2022年第24期100-102,106,共4页Shandong Chemical Industry

基　　金：山东省教育厅专项资金2016009。

摘　　要：钢铁试样通过酸溶的方法进行预处理,在适当的酸度条件和钼酸铵浓度下,在高温下形成磷钼酸,并用氟化钠-氯化亚锡混合液还原为磷钼蓝,用分光光度计在波长715.0 nm处测定磷钼蓝的吸光度,以测定磷的含量。基于此,建立了一种测定钢铁中磷含量测定的方法。该方法线性范围为0~2.00μg/mL。The steel samples are treated by acid dissolution.Under the appropriate acidity and concentration of ammonium molybdate,phosphomolybdic acid is formed at high temperature,and reduced to phosphomolybdic blue with the mixed solution of sodium fluoride and tin dichloride.The absorbance value of phosphomolybdic blue is measured at the wavelength of 715.0 nm with a spectrophotometer to determine the content of phosphorus.Based on this,we establishes a method for the determination of phosphorus content in steel.The linear range of this method is 0~2.00μg/mL.

关 键 词：磷钼蓝 标准加入法 钢铁 

分 类 号：O657.32[理学—分析化学]