硅铝钙钡铁合金中主元素的快速分析

Rapid Analysis of Primary Elements of Silicon-aluminium-calcium-barium-ferrous Alloy

试验用强碱溶样、过氧化氢氧化、盐酸酸化后制取母液,用硅钼蓝差示光度法测定硅;均三溴DBS-偶氮胂光度法测定钡,CuSO4-EDTA返滴法测定铝,EDTA容量法测定钙。结果表明,分析周期缩短,方法的精密度和准确度达到国标允差要求。

A mother solution is made after the sample is resolved with alkali, oxidated with hydrogen peroxide and acidified with hydrochloric acid, the silicomolybdic blue photometric method for the determination of silicon, equal tribromo DBS-arsenazo photometric method for the determination of barium, CuSO4-EDTA back titration method for the determination of aluminium, and EDTA volumetric method for the determination of calcium. The result show that the time of experiment is shortened, the method＇s precision and accuracy all meet the request of national standard.