抗坏血酸磷铋钼蓝光度法测定硅锰铝合金中磷

Determination of Phosphor in Silico-manganese-aluminum Alloy by Ascorbic Acid-phosphor-bismuth-molybdenum-blueness Photometry

试样以硝酸、氢氟酸溶解后，高氯酸冒烟氧化磷及驱除去硅和氟，并控制酸度，磷在氧化性酸介质中与硝酸铋、钼酸铵生成三元络合物，用较弱的还原剂抗坏血酸在室温条件下迅速还原成磷铋钼蓝色泽，借此测定磷含量，本法具有简便、快速、准确度高等优点。

After a sample was dissolved by nitric acid and hydrofluoric acid, with perchloric acid smoking to oxidize phosphor to remove silicon and fluorin and control A. V.. In oxidized acidic medium, phosphor formed ternary complex with bismuth nitrate and ammonium molybdate. At room temperature, Ascorbic acid, a feebly reducing agent, rapidly reduced it into phosphor-bismuth molybdenum-blueness color and luster, by which to determine phosphor content. This method has the advantages such as convenience, speediness and high accuracy.