摘要
在稀HNO3介质中 ,磷与钼酸铵形成磷钼杂多酸络合物 ,可被乙酸丁酯萃取 ,用火焰原子吸收光谱法测定磷钼杂多酸中钼从而间接测定磷 ,硅、砷的干扰可通过溶样时排除 ,磷含量在 0 2 0～ 3 8μg/mL时线性关系良好 ,相对标准偏差小于3 8%。用于煤样中磷的测定 。
In dilute nitric medium,phosphorus reacts with ammonium molybdate to produce phosphomolybdenum heteropoly acid which can be extracted by butyl acetate.Molybdenum in phosphomolybdenum heteropoly acid is determined by FAAS,thus phosphorus can be indirectly determined. During the process of decomposing sample the interference of silicon and arsenic can be eliminated.The linear relationship is in the range of 0.20～3.8 μg/mL for phosphorus.The RSD is less than 3.8%.The method was applied to the determination of phosphorus in coal with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
2004年第4期52-53,共2页
Metallurgical Analysis
