铸铁轧辊中Si、P、Mn、Cr、Mo、Ni、Mg的联合测定

Joint Determination of the Si,P,Mn,Cr,Mo,Ni and Mg in Cast Iron Roll

用硝硫混合酸统一处理方法制备试液,用同一母液分别以光度法分析Si、P、Mn、Cr、Mo、Ni、Mg元素的含量。通过控制分析的酸度,各元素线性良好,分析误差完全在国标误差范围内。该方法可缩短分析周期,精密度、准确度高,镍、锰、铬、钼、硅、磷、镁的相对标准偏差分别≤2.76%、2.11%、3.25%、3.21%、1.88%、7.22%、4.13%,方法可行。

The test solution was prepared by unified treatment using mixture of nitric acid and sulfuric acid. The contents of the Si,P,Mn,Cr,Mo,Ni and Mg elements were determined respectively by spectrometry in the same mother solution. By controlling the acid value correctly,the determination linearity of each element is good and the analysis errors completely conform to the national standard. This method with high precision and accuracy shortens the analysis period. The relative standard deviations of the Ni,Mn,Cr,Mo,Si,P and Mg are less than 2.76%,2.11%,3.25%,3.21%,1.88%,7.22% and 4.13%. The method is concluded to bepracticable.