【摘要】 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。更多还原

【Abstract】 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.更多还原