高碳铬铁中Cr、P、Mn的联合测定

Combined measures of Cr,P and Mn content in high-carbon ferrochromium

用过氧化钠熔融酸化的方法处理样品,用同一母液分别以过硫酸铵氧化容量法测定铬、钼蓝光度法测定磷,过硫酸铵银盐氧化光度法测定锰。通过控制测定的酸度,各元素线性良好,测得铬、磷、锰的相对标准偏差分别小于0.55%、4.75%、3.76%。该方法可缩短分析周期,精密度、准确度高。

After the sample is treated with sodium dioxide fusion and acidification method, chromium content is measured with oxidation volumetric method of ammonium peroxysulfate ; P content is measured with molybdenum blue photometry ; Mn content is measured with silver salt oxidation photometry. Through controlling the acidity, linearity of various element is good, and relative standard deviation of Cr, P and Mn are less than 0.55 % ,4.75 % and 3.76 % respectively. This method can shorten analytical cycle. Moreover, its precision and accuracy are high.