盐酸介质磷钒钼黄直接光度法快速测定钒浸出液中的磷

Rapid phosphorus analysis in vanadium－ leached solution using direct absorbance measurement in hydrochloric acid media phosphorus－ vanadium－ molybdenum yellow system

研究了不同介质中钒钼黄法的分析特性和干扰因素 ,选定盐酸介质建立了快速分析钒浸出液中磷的直接光度法 .该方法用钼酸钠作显色剂 ,显色酸度 1.2 N,λ =430 nm,ε =1300,0～ 400μ g线性良好 ;检测下限 1.67μ g(3s),共存组分无干扰 ,50～ 350μ g加标回收率 97.6％～ 102.1％ ,100μ g中重复 11次分析 ,RSD=1.52％ , X=100.48μ g.

Compared with analytical characteristics and interfering factors for different media,hydrochloric acid was chosen as media in direct absorbance measurement to analyse phosphorus of Vanadium－ leached solution. In this method,ammonium sodium was chosen as chromogenic agent ,under the conditions that:the coloration acidity is 1.2 N,λ =430 nm,ε =1 300.We concluded that when phosphorus content is between 0～ 400μ g,Beer's law is obeyed;when phosphorus content is lower limit 1.67μ g(3s),the coexistence components don't interfere with phosphorus ;when phosphorus content is 50～ 350μ g,the adding standard sample rate of recovery is 97.76％～ 102.1％ ;when phosphorus content is 100μ g,eleven times analyses are made and given.RSD=1.52％ and X=100.48μg.