磷锑钼蓝光度法测定红土镍矿中磷量

Determination of Phosphorus Content in Red Clay Nickel Deposit by Using Phosphorus Antimony Molybdenum Blue Photometric Method

摘要:

试样经烘干处理后，利用硫酸和氢氟酸溶矿，硝酸提取，加氨水以氢氧化铁为载体沉淀磷酸盐，分离镍、铬、钴、铜等干扰离子，制备成硝酸溶液。中和后，以钼酸铵—酒石酸锑钾为显色剂，以抗坏血酸为还原剂，显色，在700nm处测量吸光度，利用计算机拟合标准曲线计算磷含量。此方法精密度与加标回收率均能满足质量要求。

Abstract:

After samples of red clay nickel ore have been dried, by using sulfuric acid and hydrofluoric acid solution, nitric acid extraction solution, adding ammonia, with precipitation of phosphate as the carrieer, separating nickel, chromium, cobalt, copper and other interfering ions, nitric acid solution has been prepared. After neutralization reaction, using ammonium molybdate and potassium antimony tartrate as chromogenic reagent, using ascorbic acid as reducing agent and chromogenic. In the 700nm, measurement of absorbance has been carried out. By using computer to fit standard curve, phosphorus content has been calculated. The method can meet the quality requirements of precision and recovery rate.